Urban Environmental Management in Latin America , 1970-2017

While Urban Environmental Management has received increasing worldwide attention in the last 50 years, much of the international attention to this growing field has focused, as is the case with most scientific fields, on the English language literature. Nevertheless, much professional work of interest has been taking place in Latin America, where the problems of the urban environment have been identified early and considered major difficulties in the development of this heavily urbanised region. Consequently, the purpose of the research that this article summarises is to address the Spanish and Portuguese language literature written in Latin America on Latin America itself to identify the trends in the field that have emerged, and are continuing to emerge, there and, eventually, to determine what lessons they offer to other regions.


Introduction
Urban Environmental Management has been receiving increasing attention since 1970 in both developed countries, where it has emerged as a subject of academic research and professional interest, and in developing countries, where it has become increasingly an area of donor concern as well.As a field, it is more like planning or engineering rather than geography, economics or sociology; and it represents an integrated view of environmental problems at city, and increasingly, regional level.Such problems are multi-sectoral (e.g., manufacturing, services, household, etc.), multi-system (e.g., water supply, sanitation, transport, issues of concern here include water supply; sanitation and drainage; solid waste; emissions from cars, trucks, buses and low-grade domestic fuels; congestion and crowding; noise, and the human occupation of lands with a sensitive green environment.These are problems common to all cities, although particular problems dominate in particular cities.Thus, Mexico City and Santiago are plagued by motor vehicle generated air pollution, while Lima has extreme difficulty in providing clean water to the stream of rural-urban immigrants.A further distinction is also made between these problems and those of the grey agenda, which are concerned with industrial pollution of the air, soil and water, including that of hazardous waste, as well as factory and fossil-fueled power plant emissions. For many years, the important issue for discussion in the context of Urban Environmental Management in Latin America has been whether to deal separately with the problems of the brown agenda, most of which are poverty induced, and the problems of the grey agenda, which are directly related to production.The two sets of problems need to be confronted in different ways.Some cities have only one or the other set of problems, while some have both (Edelman, 1998).
A third set of critical problems concerns management.As Mitlin and Satterthwaite have pointed out (1996), the urban environment cannot be managed strictly within the confines of a city's political boundaries.Instead, local, regional and national frameworks for management are necessary.In the Latin American context, local refers not to municipalities, but rather to the urban agglomerations composed of numerous municipalities.For example, Metropolitan Lima is divided into over 40 municipalities, each responsible for garbage collection.In rich areas, this goes well; in poor areas not so well.In Bolivia, under its system of devolution of administrative responsibility, each of the country's 311 municipios includes an entire municipality plus its hinterland, but many do not have functioning institutions to manage the array of environmental problems they face, but in many other countries, environmental management remains highly centralised, and insufficient attention is paid to the different institutions involved in the management process, each with its own mandate and area of geographic responsibility.
The more recent literature of Urban Environmental Management suggests a shift from the initial compartmentalized and thematic discussion about challenges for cities, such as the difficulties of dealing with these issues separately.At present, more work acknowledges the complexity and interconnectedness of these issues, and consequently, the discussion focuses on the need for public sector led systematic change to address these pressing urban issues in a preventive rather than a reactive manner.
The important issue for discussion here, then, is what sort of flexible and pragmatic institutional structure is appropriate for managing the environmental problems of urban areas in Latin America.It is appropriate to explore the DOI: 10.4236/cus.2017.53017308 Current Urban Studies framework levels of Mitlin and Satterthwaite in this regard, as well as different organisational models at each of the levels.What works in one country may not be successful in another.However, the approach to developing frameworks would be the same in all cases.
Beyond these three initial sets of problems, which are technical and managerial, a fourth set of critical problems relates to a lack of knowledge and awareness of, and/or concern with, urban environmental problems by both the general public and policy makers in general.While much of the general public might be affected by the ignorance of poverty, public officials are not.For them, the reality of their political circumstances simply puts higher priority on other, generally economic, concerns.In this context, the important issue for discussion is how to raise the level of attention given to the urban environment by both the public and its representatives.
Of interest here, however, is the fact that much of the international attention to this new and growing field has focused, as is the case with most scientific fields, on the English language literature.That is, most of the knowledge on emerging environmental issues occurs in centers of research and technological development of the "North," pointing to a lack of capacity in scientific and technological self-determination to feed sustainable policy development in Latin American countries (Fernández, 2000).Nevertheless, much professional work of interest has been taking place in Latin America, where the problems of the urban environment have been identified early and considered major difficulties in the development of this heavily urbanised region.The former President of the Interamerican Development Bank (IADB), Enrique Iglesias, has stressed the importance of cities, democratisation, decentralisation and infrastructure, among other themes important in the urban sector of Latin America.These points converge in the urban environment.
Consequently, the purpose of the research that this article summarises is to address the Spanish and Portuguese language literature written in Latin America on Latin America itself to identify the trends in the field that are emerging there and, eventually, to determine what lessons they offer to other regions.

Structure of the Paper and Research Methodology
The work described here has been a desk study based on Internet research, and it is divided into two phases.Phase I covers the period from 1970, just prior to Habitat I in Vancouver (1976), to 1998, two years after Habitat II in Istanbul (1996).This work has been published in Spanish (Schuster and Edelman, 2002) and English (Schuster and Edelman, 2003).Phase II builds on, modifies and expands the previous work to cover the period from 1998 until 2017.Habitat III in Quito (2016) brought the global discussion of urbanization and Urban Environmental Management to the heart of Latin America.As most who have tried to do so know, navigating through the Internet and struggling to identify and obtain as much information as possible in countries where this type of data access is not always available is not always easy, but in the end, it proved a fruitful effort.The first step in the initial study (Phase I) was to identify as many books on the topic as possible and find summaries or annotations of them.From all the information received, it became quite clear early on that the trends for Latin America could be divided into four historical periods.i.To confirm the conclusions drawn from an analysis of the books found through the Internet, a second stage of the research was undertaken in both phases to search the Internet once again, this time for journals and magazines specialised in environment related matters.The same time periods were utilised to see if the trends identified in the books were paralleled by those in the periodic literature.The research approach was somewhat different, however.During the research, it became clear that most books of interest are found at the Internet sites of national libraries, which give access to other countries as well.Thus, sometimes only one Internet site would provide a sufficient range of information of a certain type so that it would not be necessary to search out another site.The United States Library of Congress holdings, for example, are very extensive.
Journals or magazines, on the other hand, are of many types, national, regional and international, ranging from commercial promotional publications for industries, to publication arms of specialised organisations, to the magazines of professional societies to university faculty or institute publications to heavily refereed journals of international academic stature.Moreover, the periodic literature changes over time with new journals and magazines emerging and older ones disappearing.This is especially true of digital, Internet-based publications.
Thus, a number of the Internet sites consulted in Phase I no longer existed by Phase II, but they were, nevertheless, replaced by similar sites.Many changes have taken place with the Internet in the forty-seven year span of this study.
Clearly, then, in order to keep up with the developments in any field from such a wide array of materials, country-by-country research was and remains essential.However, the Latin American region is very large, and not all countries are places of active research or professional practice in Urban Environmental Management.Consequently, a selection of seven countries representative of the Spanish and Portuguese language countries of the Western Hemisphere was made.They vary in size, location and level of development, but include most of the region's urban (and overall) population; and all have recognised the severity of the problems of the urban environment and have active professional and academic institutions attempting to deal with them.These countries are Argentina, Current Urban Studies Brazil, Chile, Colombia, Cuba, Mexico and Peru.Some additional literature peripherally addresses El Salvador, Ecuador, Venezuela and Latin America as a region.

The Latin American Context
Trends in the literature of Urban Environmental Management cannot be analysed without understanding the overall historical context of the region.This is the case, at least in Latin America, for which the evolution of the literature of interest to this research is a clear reflection of regional history.As David Goodman and Michael Redclift (1991) have stated: Latin & Central America, even before its official discovery, was looked upon by Europeans as the gateway to the Indies; it came to represent an apparently inexhaustible supply of everything that Europeans needed.Locked up within its vast jungles and tractless mountain ranges was a store of natural resources that could be translated into wealth.It required ingenuity, and the hard labour of (largely) unwilling hands, to convert these treasures into tangible material benefits.The image of Latin America in European art, as Baddeley and Fraser (1989) demonstrate, is bound up with the otherness of the continent.This distance, usually portrayed as the distance between primitive and civilised values, justified the Spaniards and the Portuguese in their conquest of the Americas, and enabled them to put a seal on their conquest by destroying those whose lives were lived closest to nature, the indigenous population of the continent.
The vestiges of the historical images conjured up by this paragraph provide a context that even in the present day help shape a wide range of development issues, including those of the environment in general and the urban environment in particular.Social, political, cultural and environmental issues have been strongly delineated by the internal and external economic processes that have taken place in Latin America, and it is the latter that has contributed to the largest extent to the development of this region.
Unlike in France, there is no clearly identifiable point in time (late 1960s) at which an organised ecological movement was founded in Latin America, although the UN Conference on the Environment held in Rio in 1992 had a substantial impact on the sustainability discourse of Urban Environmental Management in the region.Instead, environmental themes appeared gradually due to external pressures as a consequence of the economic dependency of the region on Europe, and even more so, on North America.Even though some early literature on environmental matters can be found, the focus is on the technological aspects rather than on the sustainability of any technology-a trend that has recently been changing (i.e., in the 1990's).An example is the case of agriculture.
Any serious study of Latin America's history since 1492 must recognise the importance of land use for plantation agriculture and rent (in the form of the labor of the indigenous population).This unsustainable and extractive form of industrial farming replaced the indigenous population's cultivation of native varieties Current Urban Studies of plants, such as tobacco, manioc, maize and potato, and their carefully balance-ed and sustainable system of resource use for production.
History shows that later a similar evolution occurred during the period of industrialisation.During the early decades of this century, several Latin American countries made important strides in their industrialisation, a process which was well advanced in countries such as Argentina, Brazil, Chile and Mexico by the 1940s.The industrial development of the larger Latin American economies was based on import substitution, and the model for development was that provided by Western Europe and the United States.Governments in Latin America assumed that pursuing industrial growth would enable the region to reduce its external dependency and, eventually, to develop a large internal market for the products of its own industries (Redclift and Goodman, op.cit.).This model, as is well known, has failed.Moreover, it created patterns of high consumption, and raised consumer expectations.Development continued, of course, but within a model of dependency that continues, along with the more recent globalisation of the world economy.
This globalisation means that Latin America's participation in the world economy and its international markets is dependent upon, among other requirements, compliance with rising international environmental standards.In the struggle for international market share, countries in the region have started to develop an environmental policy profile, so as not to be discriminated against by the rest of the world.It has become a major task for governments to confront their legal and institutional limitations and management needs, as well as to recognise their natural resource potential.This implies giving higher priority to the environmental management of natural resources; defining more clearly institutional responsibilities and ensuring that more interests are represented; participating in the definition of international environmental management standards (e.g., ISO 14000), and exploring further the use of economic instruments for tackling environmental problems.None of this is, of course, urban, and the urban trends will be discussed in more detail later in this paper.The essential point to make here, however, is that this search for an overall environmental policy and strategy is necessary in each country.Of course, each country has its own history, social fabric and institutions, so the model adopted will vary; and some countries will achieve more than others in this regard.Nevertheless, the trend region-wide towards better environmental stewardship is apparent, and this is clear from the research of the literature on Urban Environmental Management that has been conducted for this article.

Trends in the Literature
The trends uncovered in literature on Urban Environmental Management reflect the evolution of history and overall environmental sensitivity explained in the previous section.To enable the reader to visualise the trends, Figure 1  Each key word, which occurred in the Latin American literature during each period, was counted, and the books for which they were cited accessed.These were then reviewed and the relevant books selected as occurrences of the key words.This point requires a bit of further explanation.
Utilising the search engine provided by the Internet sites, a long list of key words was first input to identify the body of bibliographic literature found in books.However, as is common with this type of search, many secondary sources that do not necessarily relate very closely to the key words that have been entered are identified.Thus, it was then necessary to look at the content of each reference and analyse its correlation with each key word.Those key words that were found to shed no light on trends in the field were then dropped.That is, words that produced few or no useful references were eliminated.In this way, the Key Word List in Figure 1 was developed.Once the books were reviewed, the same procedure was applied to the periodic literature.All the references that have emerged in this study are, therefore, the result of this procedure; and, together, they form a picture of the most important issues per period, as well as the developing trends for the region over time.This Key Word List is repeated in the Section 11 Annex at the end of this paper, along with the percentage of occur-rence per period for each word in all five periods, which is displayed in Figure 2 in the Annex.
• The 1970 to 1979 Period: Environmental Compartmentalisation Demography, water, air, soil and land, transport, energy, ecology, waste, urban development and environmental pollution are the most salient environmental themes appearing in the Urban Environmental Management literature of this period.Since each of these themes was treated as a matter for separate study, and no interrelationships appear among them in the literature, this period has been identified in the research as the period of Environmental Compartmentalisation. Historically, this was a period of rapid population growth, and genuine development in the region.Living standards rose significantly.The conservation of the Amazon forests emerged as the first great green environmental issue.
With regard to the urban environment, it is the period in which studies of water systems; the effects of energy production and use in cities; the meteorological aspects of air contamination, etc. try to describe the effects of the rapid growth and development phase of this period of urban based import-substitution driven industrialisation.
• The 1980 to 1989 Period: Environmental Implications of Development The environmental impacts of agricultural systems, human ecology, energy and ecology, urban transportation and its pollution, community development, as well as Indian communities and the environment are the key issues of this period.Migration to metropolitan cities and the growing population, both consequences of the previous period, along with the effects of the two oil crises of the 70s and the disastrous debt situation that affected development throughout Latin America, were factors that undermined the general economic improvement characterising the region in the 70s.Thus, the 1980s was a period of severe economic recession.Available jobs for poor urban immigrants vanished, and living standards fell abruptly.Social conditions, such as race, language, income and gender became crucial determinants of social position.
The important point here regarding this economic crisis is that it became a leading factor in fostering the period's new perception of the environment.At this time, Latin American countries were confronted by a mix of factors that reflected the past, while they first began to exhibit signs of future urban environmental trends.That is, past development policies began to have negative consequences and implications for the environment during this period.The growing literature on the implications of, for example, the technological model of agriculture pursued in much of the region; solid waste generation, collection and disposal for the inhabitants of cities; the quality of water supply networks for this increasing urban population; the consequences of resource exploitation in underdeveloped areas; the quality of urban life in the region; the impacts of human activities on nature, etc. portrayed the consequences of past development policies on the economic crisis, which touched every aspect of urban life, including the environment.Current Urban Studies At the same time, a new trend in the literature describes the consequences of the crisis for Latin America's social movements.Indigenous communities made themselves heard after decades of being discriminated against in silence, and they began to claim the right of ownership of much of the natural heritage in a number of countries to halt its exploitation by civilisation.While this has little to do with the urban environment, the strengthening of social movements around environmental issues has developed into an important force in the 1990s.This has primarily taken shape at the community level in the poor areas of the region's megacities, with Lima (Miranda et al., 1996) and Rio de Janeiro (Edelman et al., 1997) providing notable examples.
Finally, the economic crisis of Latin America in the 1980s has become a persistent reminder of a history of poor development planning by lingering in many countries as a debt crisis even after an economic turnaround has taken place.This economic growth, which has put so much pressure on the urban environment, has also made clear the importance of preserving natural resources.Pressured by developed countries, some governments decided to accept the Green Solution to their debt problem through so-called Debt-for-Nature Swaps.These exchanges both reduce the national debt and save the environment.Typically, international environmental groups would buy a country's discounted debt on the financial markets and turn this over to the debtor government, which would then commit local currency to create a national park, for example, which would still be owned by the government and hence generate revenue for it.
Unfortunately, none of the options to reduce the debt during the 80s, including the debt swap concept, was really effective.While this issue had little to do with the urban environment per se during that period, it nevertheless brought to the consciousness of the urban population the fact that the environment had value.Moreover, by the end of the decade there was a growing international awareness of the inter-relationships between the plight of the poor and environmental degradation, and the need to pursue a pattern of development, which at least had some chance of being sustainable (O'Brien, 1991).
Perhaps the most significant development in the literature of this period for the development of the field of Urban Environmental Management, however, is the appearance of urban literature on development.While in this period, all literature in some way related to the environment continued to focus solely on ecological aspects, such as water pollution, water quality, air pollution, soil contamination, and most literature related to development concerned regions or countries, the Latin American development literature began to take on an urban focus.In terms of economic and technological growth, population growth, and the social consequences of both, job creation reflecting these developments was increasingly an urban phenomenon, which accelerated urban migration.Urban literature of the time was hence concerned with the growth and development of the cities in the region, without relating this historic and social transformation to that literature focused on the environmental implications of human activities.The two bodies of literature remained separate.
• The 1990 to 1992 Period: Economic Development and Sustainability With the recognition of the interrelationships between the Latin American economic crisis of the 1980s and environmental conditions, a turning point was reached in the environmental literature of the region.The early 90s was a period when the literature became far more explicit in recognising the relationships between economic development and environmental consequences, while urban and environmental academics and professionals searched for new models to explain the interactions and for new solutions.
It is not surprising, then, to find quite a number of books related to different perceptions of pollution and of environmental issues.These range from considering labour unions and the environment, to women and the environment to the politics of the environment.The literature begins now to take a much more urban tinge through expansion of environmental concerns from green issues to brown and grey ones as well.Books related to solutions became more urban as well (See Galarza andHurtado, 1991 andGutierrez, 1991).While the traditional environmental concerns of natural resource conservation still dominated the agenda, new computer models of the interactions between population and environment, of the use and possible ways to conserve natural resources and of measures to abate atmospheric pollution recognised explicitly the urban settlement pattern of Latin America and the effect of it on the environment.A large step was taken in the literature from concern with the issue of natural resource conservation to that of the promotion of environmental sustainability.Sustainable development became a guiding principle of governmental policy (or at least lip service was paid to it!), and decentralisation as a way to alleviate social inequities and achieve sustainable growth became a serious policy alternative.
This turning point in the literary trend on the environment in Latin America from rural to urban was facilitated not only by the recognition of the interrelationships between economic development and environmental conditions, which were increasingly urban dominated, but also by the economic and political context of the region.Slowly, countries began to overcome their economic malaise and leave behind memories of dictatorial periods.Brazil and Argentina had elected governments once again, and democracy led to strong consideration of the need for decentralisation.
Along with this trend came the call from urban communities for recognition of their specific problems, and these difficulties had a very heavy environmental component.Pollution of air and water from factories and vehicles, as well as from garbage and excrement, caused public health in urban popular areas to be exceedingly poor.The lack of potable water, wastewater treatment and solid waste disposal, along with congestion, noise pollution and the hazardous wastes of small scale industries based in the communities, became important issues, and the people affected began to demand action.
Thus, during this period, a new trend showing the relationship between Current Urban Studies economic development and sustainability begins to emerge.The consequences of the large rural-urban migrations are now seen not only for their developmental and social significance, but new environmental problems resulting from the migrations are recognised as well.This, then, is the period during which urban problems converge with ecological or environmental problems and begin to be seen as urban ecological or urban environmental problems, such as air pollution due to transportation, water pollution due to mismanagement, floods due to urban generated deforestation, health problems due to urban environmental degradation, noise pollution due to the nature and density of urban activities and soil contamination due to the increasing demands of urban based manufacturing.
• The 1993 to 1998 Period: Sustainable Development There seems to be a clear break in the literature in 1993, after the impacts of the United Nations Conference on the Environment held in Rio de Janeiro in 1992 began to be seen in the literature.The transitional period of the early 1990s was definitely over, and economic and political stability were accepted in the region as the norm.Sustainable development was now accepted as a global goal, with globalisation and interdependency pressuring countries in this region, as well as others, to adjust to international environmental standards.
What characterises the literature at present is its focus on environmental management issues.Incorporating the environment into public policy is no longer an issue; neither is the importance of the urban environment.The environment is now seen to have both rural and urban components and be brown and grey, as well as green.The burning issue now is how to manage the environment and who should do what.The various stakeholders involved now are not only national and regional governments, along with their decentralised lower organs, but also community groups outside the structure of government that may be formally organised (i.e., community based groups or CBOs) or not; organised invasions of empty urban land by rural based citizens relocating en mass to a city; the large number of non-governmental organisations (NGOs) so characteristic of social movements in many Latin American countries, but the private sector as well.
The private sector has a double role here, both as a polluter (most notably industry of all sizes), which needs to take measures to pollute less, and as a provider of urban infrastructure, again at various scales, which provides urban environmental services.These range from community level street sweeping, garbage collection and water provision, where their management is often tied to job provision and poverty alleviation, to city level waste treatment and disposal, where efficiency and low cost to the public treasury are stressed.
Finally, the last important trend to appear in this period is the necessity of providing an institutional and legislative framework to enable both community and municipal initiatives to be successful in dealing with the urban environment.
Bolivia is perhaps the country in the region that has gone the farthest in this Current Urban Studies Sustainable development is the key phrase in the literature of this period.After the recognition of the relationship between economic development and the environment, as well as the identification of the problems stemming from this relationship, it became clear in the literature that a major issue of the turn of the 21 st century would be the sustainable development of cities.Thus, the Latin American literature of this period centres on the urban environmental problems that are consequences of human activities, as well as on their possible solutions, the various policy options to be considered in developing frameworks within which to implement the solutions, the necessary changes in management to support implementation, the new institutional arrangements required to sustain the solutions and the changes in human behaviour essential to making all of this happen.Ecological or environmental and urban issues finally converge in the literature.
• The 1999 to 2017 Period: From Policy to Action However, the period spanning the last nineteen years became a transitional era of Urban Environmental Management, the conclusion of which was marked by Habitat III in Quito in 2016.During this timeframe, the literature moved from the consideration of concepts and policies to the recognition that meaningful programs and actions to enable sustainable development must be taken at the local level.Moreover, it has become evident that these actions must be undertaken in a systematic way within the framework of urban and regional planning.By 2002, many countries already had the laws, the institutions and even some judicial victories to support Urban Environmental Management, but serious issues of pollution remained due to systems of production and consumption  2002).Thus, the time for policy development is over; it is time to act.

Trends in the Periodic Literature
After the search of the Spanish and Portuguese language Latin American literature on Urban Environmental Management appearing in books was completed and the trends perceived, the second stage of the Internet search proceeded to identifying journals or magazines from the region related to environmental issues.The purpose here was to confirm the findings of the initial search of books by seeing if the trends in journals were the same.This periodic search was done on a country-by-country basis for Argentina, Brazil, Chile, Colombia, Cuba

Mexico and Peru
The first and most interesting observation from the periodic search of Latin American literature is that no single journal on the urban environment, or even on the much broader subject of the environment in general, existed in these seven countries prior to 1990!In fact, most of them did not appear until 1992/1993.Finally, given their nature and subject matter, it should be noted that journals related to the environment in Latin America appeared to reach an educated and sophisticated audience of academics, activists from leading NGOs, urban and/or environmental professionals and representatives of major industries and large enterprises, all of whom would be most interested in the most recent developments.These would extend to items of relevance regarding court cases, legislation, international environmental events and international standards.Consequently, it was assumed that the articles found in these journals in relation to the urban environment would parallel the regional environmental themes of Period 4 (i.e., sustainable development, economic policies, decentralisation, environmental law and legislation, etc.), as well as the call to action of Period 5, found in the Internet book search for Latin America.The assumption was confirmed in that all articles appearing in all journals from the seven countries were found to focus on the above-mentioned themes and mirror the trends described in the previous section.Finally, the trends found in the journals are also notable in that they are the same for all seven countries, which vary widely in level of development, type of economy, population, political system, social structure, physical endowment and location in the region.

Conclusion
As a result of the research undertaken, there is a clear trend of convergence of three elements in the Urban Environmental Management literature of Latin America that can be seen to have developed through the five periods analysed above.Initially (1970Initially ( -1979)), studies that were conducted regarding ecological or environmental problems were quite distinct from those analysing developmental issues and technological considerations.This trend remained the case in the second period (1980)(1981)(1982)(1983)(1984)(1985)(1986)(1987)(1988)(1989), although a more comprehensive literature began to Current Urban Studies evolve on the development and growth of cities. Economics and population were the dominant regional issues at this stage.In the third period (1990)(1991)(1992), however, the previously fast economic growth and the increased migration to the cities it set off, followed by the severe regional economic crisis and the rise of social movements, began to be reflected in the literature through discussion of the environmental consequences of these developments.A combination of human activity and environmental implications became the focus of many regional studies of this period.Next, the strands in the literature devoted to the environment, economic development and urbanisation in Latin America became intertwined at the beginning of the fourth period (1993)(1994)(1995)(1996)(1997).Due to both external and internal pressures, it became widely recognised that the cities of Latin America could not cope any longer with their environmental problems without managing the processes generating them.Finally, the fifth and last period (1999-2017) became a period of transition.Progress has been made in the formulation and implementation of environmental policies, both at national, subnational and local levels, and in the development of various plans and instruments for environmental protection.Moreover, countries have environmental authorities today presenting different degrees of development, and most have a national executive agency specialised, either in the form of a ministry, committee on the environment or other equivalent entity (Ibid.).National and regional policies began to be transformed into local plans for action within the framework of urban and regional planning.This evolving focus of Urban Environmental Management was apparent in Habitat III as noted below.
Given the findings outlined in the previous sections and summarised above, it is important to note that this research is an ongoing project.This process awaits a further analysis the literature of the Spanish and Portuguese languages written in Latin America and about Latin America post 2017; that is after another meaningful period marked by a possible Habitat IV or other similarly significant event in urban planning and environmental management.Habitat III concluded with the drafting of a New Urban Agenda, highlighted by the Quito Declaration on Sustainable Cities and Human Settlements for All.This is a landmark document in Urban Environmental Management by pledging in Section 14. (c) to be guided, among others, by the principle: Environmental sustainability, by promoting clean energy, sustainable use of land and resources in urban development as well as protecting ecosystems and biodiversity, including adopting healthy lifestyles in harmony with nature; promoting sustainable consumption and production patterns; building urban resilience; reducing disaster risks; and mitigating and adapting to climate change (Habitat III, 2016).
A further statement of note is that a fundamental driver of change is: ….reinvigorating long-term and integrated urban and territorial planning and design in order to optimize the spatial dimension of the urban form and to deliver the positive outcomes of urbanization.

Directions for Future Research
All signs point, then, to the next phase of Urban Environmental Management being one of implementation at the local level.Future research, if undertaken, would determine if this is indeed the case.Issues likely to develop during such a Phase III analysis for Latin America include whether and how resources and authority for implementation will be transferred from central and regional governments to localities, whether they have the necessary technical and managerial expertise to run complex programs and if the international community will invest in these efforts.
The completion of a similar study of the overall English literature, as well as of companion studies of the literature representing a number of other languages and regions, of which this work would then form only a part, is another fruitful direction for further research.Thus, in another future study, the conclusions reached for the Latin American literature could be compared to those from the study of the overall English literature, as well as to those findings from the literature of other regions and/or languages to develop a time trend analysis, which would indicate the intensity of certain subjects (trends) according to time period and region.This would not only indicate the development of the field through identifying the most important issues and possible solutions at any point in time, but it would also give insight into which regions of the world are leaders in any particular aspect of Urban Environmental Management.

Annex: Key Word List
The Key Word List represents the most common themes appearing in the Latin American literature on Urban Environmental Management between 1970 and 1998.The incidence of their occurrence in the Internet literary search represents the key element used in tracing the trends in the literature, and based upon this, the four distinct periods discussed in Section 4 emerged.The words are described below to provide the reader with the meaning behind the use of a word or phrase in the literature, but these descriptions are not necessarily definitions of the words themselves.The reason for developing these descriptions is that during the course of this research, it became obvious that many key words used in the Internet searches of books and the periodic literature make reference to issues that are not necessarily made explicit merely by providing a conventional definition of the term, but which are clearly related to this study.The key words described below, then, are the most significant and frequently occurring ones found in the search and are presented here merely for purposes of clarification.
Figure 2, which follows the Key Word List, presents the pattern of occurrence of each word by period.
• Environmental Impacts: is a key word referring to the effects on the overall environment and on various ecosystems as a consequence of human activities such as agriculture, urban transportation, atmospheric pollution, poverty, etc.
• Demography: in the literature reviewed refers to population growth and the expansion of the urban space due to migration.
• Water: refers to both water supply and water quality (including water pollution), but not to water treatment.
• Air: generally refers to atmospheric pollution as a consequence of CO 2 emissions from transportation.
• Soil/Land: usually refers to the extensive use of land for agricultural activities, and its implications on soil quality.
• Transport: refers in the literature both to urban transportation systems and the air pollution they produce.
• Energy: is a key word that normally refers to energy generated pollution as a consequence of large infrastructure projects such as dams, power plants, road networks, etc.
• Urban Development: in the Latin American literature usually refers to issues related to architecture and urban growth, and to the necessity to satisfy the increasing demand for urban housing.
• Ecology: is a key word in the literature reviewed that normally refers to ecosystem disruptions, such as have occurred in the case of the Amazon and some other forest areas in the region.
• Waste: initially appears in the literature not as waste per se, but mainly as the value of waste and its importance with regard to the urban environment.• Environmental Pollution: refers to pollution of all the environmental compartments (i.e., air, water and soil).
• Urban Pollution: • Population and Environment: is a term that recognises the interrelationships between population and its surroundings.
• Health: as a key word refers here to human health as a consequence of environmental pollution.
• Woman: as a theme appears in the third period (i.e., 1990-1992) of the Latin American Urban Environmental Management literature and looks at the impact of environmental pollution on the daily lives of women.
• Perceptions: as used in the literature reviewed, refers to new perceptions of life that have been developed related to environmental problems in general, but focused on the urban environment (i.e., a new understanding of the importance of human surroundings and the cities in which humans live).
• Environmental Law: refers both to national and international law, which has the aim of solving and controlling trends which are harmful to human life and the urban environment.
• Environmental Policy: within the context of this paper is related to the environmental problems associated with economic growth and to the policy proposals for achieving sustainable development.
• Sustainability and Economy: in the Latin American literature generally refers to debt equity swaps; i.e., the exchange of sustainable practices and protection of the environment for national debt relief.
• Sustainability and Decentralisation: in the Latin American literature is a theme characteristic of the third period of this research (1990)(1991)(1992), which generally refers to the geographic decentralisation of economic activity considered as a solution to alleviate social inequities.At present, however, the term would be more related to political decentralisation.
• Environmental Management: is used in the literature to mean environmental management in the technical sense and also to describe the governmental and institutional approaches and methods to cope with urban environmental problems, the severity of which is increasingly being recognised.
• City Planning and Management: appears in the second period (i.e., 1980-1989) of this study of the Latin American literature on Urban Environmental Management in relation to the physical, ecological and landscape aspects of urban areas.• Poverty: is described in the urban literature reviewed here only as part of the interrelated chain comprising conservation, environmental problems, and socio-economic development.
• Indian Communities: is a term that relates to environmental problems and the sustainable practices of Indian communities.This is often related to the issue of the Amazon and the impacts of modern civilisation on Indian life.
• Social Movements: is a key word that refers here to the social movements Phase II analysis identified one further historical period with its own unique characteristics; i.e.: e) 1999/2017 Figure 1.Trends in the Latin American literature on urban environmental management.
D. J. Edelman et al.DOI: 10.4236/cus.2017.53017315 Current Urban Studies regard so far.Despite the movement in the literature in the five periods from recognising the problems of the environment, to assessing the effects of pollution on the largely urban population, to recognising the systematic nature of the interconnections of the environment and the region's urban based economy and hence the need for sustainable development, to attempting to create the policies and tools to manage the urban environment, it is clear that the problems of the past have not yet been solved.They remain subjects for further study and hence have not disappeared from the literature.That is why the current thematic mix includes the older subjects of rural development and the environment, environmental degradation in rivers, deforestation (first apparent in Period 1); the population and the environment, including the effects on people of all kinds of urban based pollution (Period 2); and the intimate connection of poverty to environmental degradation in cities, as well as the necessary steps to take to ensure sustainable development (Period 3).Nevertheless, the new themes of developing an institutional and regulatory framework, determining the proper the role of the private sector in urban environmental management and promoting environmental management in industry (Period 4) began to take precedence in the literature,

Figure 2 .
Figure 2. Frequency of Occurrence of Key Words by Period.*The figures used here represent the percentages of all relevant references occurring in the five periods in which each key word appears, with the darker the shading, the greater the frequency of occurrence.