[muffaletaman]

Plants need CO2 AND “food” (fertilizer, manure, organics-rich mineralized soil, etc.) for their metabolism. Just like they need water. None of these inputs can take the place of the other, all are needed. Air - food - water.

[dfwgator]

Plants need CO2 AND “food” (fertilizer, manure, organics-rich mineralized soil, etc.) for their metabolism. Just like they need water. None of these inputs can take the place of the other, all are needed. Air - food - water.

Water? You mean like from the toilet?