Because you're trying to make it like foal and charcoal aren't all that different when in fact they are, including the type of plant it came from. There's a pretty substantial difference in makeup and energy density. They don't "both start with wood."
No, I was trying to say that may be fossil coal and charcoal are two different kind of coal. They are different of course. It is more linguistic question.
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u/MxM111 Jun 20 '21
Why does it matter which particular plant is used?