In the period from 1751 to 2008 about 347 gigatonnes of carbon were released as carbon dioxide to the atmosphere from burning of fossil fuels.)Carbon is also locked up as methane and methane hydrates in polar regions.. 
Ó jẹ́ ràdẹ́ (papọ̀ mọ́ Kriptóní àti kbọ́ọ̀lùnú) ní 1898 gẹ́gẹ́bí ìkan nínú àwọn Elimẹ́ńtì aìgbéra tóṣọ̀wọ́n tó ṣekú nínú afẹ́fẹ́ gbígbẹ, lẹ́yìn tí nitrojin, OKSIjin, ArÌwọ̀nyí àti Difaraksì Karbọnu ti jẹ́ yíyọ́ kúrò.. 