The transition from fossil fuels to cleaner, safer energy technologies is under way. To pinpoint where decarbonization is happening most rapidly—and to extract lessons and best practices that can be applied to other areas of the global economy where progress is needed in the fight against climate change—this study by ClimateWorks, NewClimate Institute, Ecofys, and Climate Analytics compares past projections with actual developments in renewable energy, coal consumption, and passenger vehicles. Key findings include: Decarbonization of the power sector is happening faster than predicted.