so IIRC, plants are mostly made of carbon pulled from the air, this being especially true for fast growing plants with minimal root systems (there may be better examples than bamboo, but that one comes to mind). Also, we have plenty of big empty pits because of strip mining. So… why not just have bamboo / whatever farms whose sole purpose is filling those pits with “captured carbon” in the form of fast growing plants. Like yea some of it will rot, but if you pile it on fast enough it quickly becomes a hostile environment for most bacteria.
In: Planetary Science
This is an area of active research, wood vaults for carbon storage. The “disposal” areas must have the right conditions, otherwise the carbon returns to the atmosphere eventually.
I believe there have been a few locations identified that would preserve the wood, and sequester the carbon for 1,000 yrs+.
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