Coal is the biggest source of electricity. it's 39% in the US and over 70% in China, for example: https://www3.epa.gov/climatechange/ghgemissions/global.html

Coal is the biggest source of electricity. it's 39% in the US and over 70% in China, for example: https://www3.epa.gov/climatechange/ghgemissions/global.html https://www3.epa.gov/climatechange/ghgemissions/global.html https://en.m.wikipedia.org/wiki/Coal_in_China https://en.m.wikipedia.org/wiki/Coal_in_China