Here's why I'm hopeful: Just Have a Think: Hemp conversion to graphene and diamond. Smart carbon capture?
This has it all, vertical farming, dense thermal depolymerization, flash graphene and growing diamonds in a vacuum. 
Diagram of the process here
We (USofA) can leave the Paris Accord countries in the dust.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Necessity is the mother of invention, but simplicity is it's favorite aunt --Amish proverb
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