Figure 1 The main global carbon pools and fluxes between them. 1 Pg (1 petagram, 1 × 1015 g) = 1 billion tonnes. Redrawn from Lal, R. (2008) ‘Carbon sequestration’, Philosophical Transactions of the Royal Society, B, Vol. 363, pp. 815–30
Photosynthesis
Carbon cycle
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