Cities are increasingly reporting that they are powered by renewable electricity. CDP holds information from over 570 of the world's cities and over 100 cities are now getting at least 70% of their electricity from renewable sources such as hydro, geothermal, solar and wind. This dataset has been compiled of data reported by cities in 2015, 2016 and 2017 in response to our annual questionnaire. Cities responded to the question: "Please indicate the energy mix of your electricity consumed at the city-wide scale." For more information go to: www.cdp.net/en/cities/world-renewable-energy-cities