3 ms·
> Only, in this case, by preventing fires we're keeping more carbon locked into plants. Completely backwards. For example see slash-and-burn farming[1], where
by hwillis 7y ago
> Only, in this case, by preventing fires we're keeping more carbon locked into plants.
Completely backwards. For example see slash-and-burn farming[1], where fields are intentionally burnt to return carbon to the soil. Plants, on their own, are not great at carbon capture. They grow and die and the carbon they captured gets re-released. To be a truly effective carbon sink you should ideally be converting plant matter into a stable form, like peat- peat takes centuries to form, but locks carbon into the ground. Rainforests also create very carbon-rich sediments. Grasslands aren't the greatest, but when they burn they don't convert 100% into CO2 and lots of carbon is left in the soil.
Farmlands on the other hand are scrupulous about harvesting all their plants and growing plants that don't leave behind much. They grow plants that are mostly fruiting body, and then the parts humans don't eat are fed to livestock, and it all gets turned with very high efficiency into CO2 and methane, which is an even more powerful greenhouse gas (until if eventually breaks down into CO2).
[1]: https://en.wikipedia.org/wiki/Slash-and-burn https://en.wikipedia.org/wiki/Slash-and-burn