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> The idea that you could do this belies total ignorance of chemistry, fossil fuel genesis and the laws of thermodynamics. Life actually does a pretty good job
by DanBC 6y ago
> The idea that you could do this belies total ignorance of chemistry, fossil fuel genesis and the laws of thermodynamics. Life actually does a pretty good job of turning CO2 into dirt which gets buried
Coal: about 350m years ago we didn't have trees because lignin had not evolved. Then we got lignin, and trees, and when trees died and fell they just stayed there because we didn't have fungus that could decompose them. Then (about 50m years later) fungus evolved that could decompose trees. All coal exists in that 300m to 350m old seam.
Life takes CO2, turns it into carbon, which is then released when those plants die and decompose.
Forests are a buffer, not a sink.
- FrojoS 6y agoI had no idea. Where can I read more about this please?
- DanBC 6y agoI used a simplification. Wikipedia has a bit more detail: https://en.wikipedia.org/wiki/Carboniferous#Rocks_and_coal https://en.wikipedia.org/wiki/Carboniferous#Rocks_and_coal
- cesis 6y agoThere's a different opinion on lignin decomposing fungi: Delayed fungal evolution did not cause the Paleozoic peak in coal production https://www.pnas.org/content/113/9/2442 https://www.pnas.org/content/113/9/2442
- est31 6y agoThanks for linking the paper! I've thought the same delay was the case, but seems my knowledge is outdated by 4 years :).
- japanuspus 6y agoInteresting -- thanks for linking. It's a pity though - I really liked the delay explanation!
- 3pt14159 6y agoI agree with your general comment, but since forests can be used for construction materials they come out a little better than merely being a buffer since the wood gets used in housing or manufacturing in places where steel or concrete would need to step in, both of which are much worse for the environment. If built with longevity in mind, wood framed houses can last around five hundred years, which is more than enough time for technological advancement to allow us to deal with excess carbon by then. Even if they're only designed as typical buildings are, it's still a good fifty years of buffer as wood in a house in addition to the buffer as they were growing as trees. Forests are a real part of the solution.
- scottlocklin 6y agoI don't know how people are eliding "forests" from my statement about soil. Soil is important and poorly understood[0], which is ironic because it's where most carbon capture is happening now. Forests are nice, and everyone likes forests, but soil is pushing the needle in ways that a shitload of 500 year old houses ain't gonna[1]. [0]https://blogs.ei.columbia.edu/2017/11/13/where-is-all-that-carbon-dioxide-is-going/ https://blogs.ei.columbia.edu/2017/11/13/where-is-all-that-c... [1] https://www.pnas.org/content/115/46/11652 https://www.pnas.org/content/115/46/11652
- looseLief 6y agoTo be fair, you can never discuss forests in any sort of scientific manner without discussing soils. The two are fundamentally linked. That said, regenerative agriculture is probably the single best carbon sequestration technology that we have given the raw amount of land we have depleted of its organic matter.
- DanBC 6y ago> Forests are a real part of the solution. Yes, absolutely. I should have been more clear. It's really important that we plant trees, and that we pay attention to the type of tree we're planting and where we plant them.
- tsimionescu 6y agoStatic forests are a buffer. Expanding forests are a sink.
- Firadeoclus 6y agoIncreasing total biomass permanently, e.g. reverting the loss in planetary forest cover, or growing the amount of soil, is a sink.
- TeMPOraL 6y agoIt's a small, shallow sink, making it effectively still a buffer. It isn't going to help much in addressing an exponentially growing flow. Especially that we won't be able to fully regrow forests anyway - there are more humans now, who need space to live and space for farming.
- DanBC 6y agoI thought it wasn't a sink because of methane?
- beamatronic 6y agoBut a buffer helps you flatten the curve. Which is most important in slowing nonlinear processes.
- ip26 6y agoIf I was a fiction writer, I'd be writing a book about how humanity used gene drives to wipe out the ability to decompose lignin. Perhaps the original plan was to release the gene into the wild again after CO2 levels normalized, but somehow the gene was lost, and atmospheric CO2 is reaching dangerously low levels...