Well, its already being done in greenhouses for many plants. And, of course its being done with C4 crops. C4 crops have a way to load CO2 so the concentration is higher where the active uptake sites gather C. This loading minimizes O2 competition for the sites that occurs in C3 plants. The key is that when stomates open C4 plants pump CO2, so it collects more CO2 per unit of water. When stomates open, transpiration occurs along a vapor pressure gradient -from moist cool in the soil to dry hot in the atmosphere thru the plant. (Desert plants have an even trickier system for gathering CO2. They open their stomates at night and store the CO2 in the leaves until the sun comes up!) Increasing CO2 levels has the same effect on C3 plants. I think the biggest opportunity for agriculture is to improve the number of crop varieties that have C4 and CAM (desert plants) photosynthedic pathways.

Well, its already being done in greenhouses for many plants. And, of course its being done with C4 crops. C4 crops have a way to load CO2 so the concentration is higher where the active uptake sites gather C. This loading minimizes O2 competition for the sites that occurs in C3 plants. The key is that when stomates open C4 plants pump CO2, so it collects more CO2 per unit of water. When stomates open, transpiration occurs along a vapor pressure gradient -from moist cool in the soil to dry hot in the atmosphere thru the plant. (Desert plants have an even trickier system for gathering CO2. They open their stomates at night and store the CO2 in the leaves until the sun comes up!) Increasing CO2 levels has the same effect on C3 plants. I think the biggest opportunity for agriculture is to improve the number of crop varieties that have C4 photosynthedica pathways.

Well, its already being done in greenhouses for many plants. And, of course its being done with C4 crops. C4 crops have a way to load CO2 so the concentration is higher where the active uptake sites gather C. This loading minimizes O2 competition for the sites that occurs in C3 plants. The key is that when stomates open C4 plants pump CO2, so the it collects more CO2 per unitl of water. Increasing CO2 levels has the same effect on C3 plants. I think the biggest opportunity for agriculture is to improve the number of crop varieties that have C4 photosynthedica pathways.