My understanding is that photosynthesis is optimized for CARBON, not light usage. Photons are abundant, CO2 availability is high, but plants run into the same p

My understanding is that photosynthesis is optimized for CARBON, not light usage. Photons are abundant, CO2 availability is high, but plants run into the same problem that carbon sequestration does: Gas is not dense, and that low density reduces the gradients you can take advantage of to make things happen. Some types of photosynthesis ALSO optimize for water usage.