Jordens oksygenproduksjon

Jordens planter og alger produserer årlig cirka 2,7 X 10^11 tonn oksygen. Rundt 80 prosent av dette kommer fra alger i havet, resten kommer fra planter på land. Jordens organismer forbruker omtrent like mye oksygen som det blir produsert. Totalmengden oksygen i atmosfæren, som er cirka 4500 ganger større enn årsproduksjonen, er følgelig konstant. - Illustrert Vitenskap nr. 6/2011


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