> The critical thing that limits CO2 capture by plants through photosynthesis is water It's not really true. The critical limit is the inefficiency of photosyn

> The critical thing that limits CO2 capture by plants through photosynthesis is water It's not really true. The critical limit is the inefficiency of photosynthesis, it's around 3-5%. The RuBisCo enzyme just sucks, compared to many other enzymes. So you can't improve the productivity of plants by adding more water. But if you do have a lot of fresh water, you can cultivate lands that are right now empty.