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C4 photosynthesis is an adaptation to higher temperatures and lower atmospheric CO2. And C4 is a very recent innovation (25 to 32 million years ago, says Wikip
by sampo 12y ago
C4 photosynthesis is an adaptation to higher temperatures and lower atmospheric CO2. And C4 is a very recent innovation (25 to 32 million years ago, says Wikipedia).
But yeah, I don't know if even the C4 plants could handle 0.01% ambient CO2.
- danieltillett 12y agoYes C4 photosynthesis is an adaption to falling CO2 levels in the atmosphere. It does come at a cost which is why in areas that are not water limited C4 plants have not out competed C3 plants.