气候学家经常提到“碳预算 ” — —也就是人类未来可以排放的二氧化碳总量，而上述总量以将全球变暖控制在比前工业化水平高两摄氏度以下为前提。
Climate scientists speak of the “carbon budget” – the total amount of carbon dioxide that humanity can emit in the coming years while still keeping global warming to under 2º.