To help compare sizes of different surface areas, we list here areas of the order of 1021 square metres, i.e. those between 1 quadrillion km2 and 10 quadrillion km2. See alsoareas of other orders of magnitude.
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1 The production of oxygen
2 Light-dependant reaction
2.1 Cyclic photophosphorylation
2.2 Noncyclic photophosphorylation
3 The Calvin cycle
The ...