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Makes me think vegetarian isn't as bad as I thought

The sunlight.

That energy is all from the sun.

It's like asking how did you get your truck from Arizona to Kansas? And somebody says, well the wheels turned along the axle. Well, duh. But you wouldn't get anywhere without gas.

Yes - It is made up from carbon from the air. But how did the carbon turn into a tree ? How did it get to Kansas.

Feynman gives a great talk on it. He calls it kind of like a "stored sun"

https://yewtu.be/ITpDrdtGAmo

The air. Specifically the carbon dioxide. Which they break down into carbon and oxygen and they let the oxygen go which is good for us and they keep the carbon and they build scaffold out of the carbon and the carbon becomes wood which is why when you burn wood you're left with black carbon.

By the way when you lose weight a very similar thing happens. When you're burning off your fat it's breaking down into gases that are released through your bloodstream and out of your lungs so you're breathing your weight out.

We are carbon based life forms. Plants use light to break apart water H2O and combine it with Carbon Dioxide (CO2) from the air to form complex Hydro-Carbons. Most of the mass of a tree is carbon that came from CO2 gas in the air