I guess what I’m asking is does this process even create much? Plants just lay roots and stare at the sun; if they had a means to get up and move – how far could they get?
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The short answer is…virtually all of it, as far as life is concerned.
Except for a few obscure organisms that live around hydrothermal vents in the deep ocean, everything alive gets *all* it’s energy from photosynthesis, or from eating things that got their energy from photosynthesis.
All *your* energy comes from some plant somewhere photosynthesizing. You either ate plants, or you ate animals that ate plants (or possibly animals that ate other animals that eventually ate plants).
So everything any human has ever done, and anything any animal has ever done, in addition to everything the plants have ever done (carpeting the entire planet and oceans isn’t exactly a trivial feat) was powered by…photosynthesis.
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