Indeed. Sunlight alone can't pull a significant amount of water out of the atmosphere, and plants/bacteria need additional energy in the form of sugars to pull carbon out of CO2 in the air.
Where's all this energy coming from?
Where's all this energy coming from?
Sorry perhaps this is not what you meant to write. For anyone who wants an unmangled understanding of photosynthesis please consult Wikipedia or other text of your choice.
However my original poorly explained thought stands there needs to be an extra component that will be consumed like ATP or H2O...