Most CO2 emissions result from the burning of fossil fuels – coal, oil, and natural gas – for energy, global consumption of which is rising as the world economy grows. As a result, we are on a path to very dangerous levels of CO2 in the atmosphere.
二氧化碳是主要的温室气体。全球能源消耗随世界经济增长而上升，燃烧煤、石油和天然气等化石能源排出绝大部分的二氧化碳。因此，长此以往大气中的二氧化碳将达到危险含量。