Most importantly, a 100 % renewable energy future would see CO2 emissions from the world's energy supply sector reduced by over 80 per cent by 2050 worldwide - providing a high level of confidence that the average global temperature rise will be kept to well below two degrees Celsius, the threshold identified as presenting unacceptable risks of catastrophic climate change. (earthtimes.org)
For example, the IPCC's Energy Supply sector for global emissions encompasses the burning of fossil fuel for heat and energy across all sectors. (epa.gov)
The energy supply sector — which spans the extraction, transportation and conversion of fuel into energy — is the largest single contributor to human - caused global warming, at around 35 percent of the total carbon budget. (scientificamerican.com)