Climate change mitigation (or decarbonisation) is action to limit the greenhouse gases in the atmosphere that cause climate change. Climate change mitigation actions include conserving energy and replacing fossil fuels with clean energy sources. Secondary mitigation strategies include changes to land use and removing carbon dioxide (CO₂) from the atmosphere. Current climate change mitigation policies are insufficient as they would still result in global warming of about 2.7 °C by 2100, significantly above the 2015 Paris Agreement's goal of limiting global warming to below 2 °C.

In the present book, ten typical literatures about decarbonizing energy published on international authoritative journals were selected to introduce the worldwide newest progress, which contains reviews or original researches on decarbonizing energy. We hope this book can demonstrate advances in decarbonizing energy as well as give references to the researchers, students and other related people.