In combination with oxygen in carbon dioxide, carbon is found in the Earth's atmosphere (approximately 810 gigatonnes of carbon) and dissolved in all water bodies (approximately 36,000 gigatonnes of carbon).
Kombineret med oxygen (til carbondioxid) findes carbon både i Jordens atmosfære (omtrent 810 gigatons carbon) og opløst i alle vandområder (omkring 36.000 gigatons carbon).