Stabilizing the earth’s climate depends on cutting carbon emissions fast.
Global emissions of carbon dioxide (CO2)—the principal climate-altering greenhouse gas—come largely from burning coal, oil, and natural gas.
Coal, mainly used for electricity generation, accounts for 44 percent of global fossil-fuel-related CO2 emissions.
Oil, used primarily for transportation, accounts for 36 percent of CO2 emissions.
Natural gas, used for electricity and heating, accounts for the remaining 20 percent of CO2emissions.