Disappointed to see no mention of accelerated weathering. Put an 8 GW nuclear reactor in Iceland, electrolyze seawater with it, dump the HCl on rocks, and dump the NaOH in the sea. Would cost about $30 billion per year to get back to preindustrial CO2 levels in 22 years.
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I'm going to put a slightly different version on my blog in a few weeks, and it will mentioned enhanced weathering. Here I focused on methods that hook into existing economics, like agriculture and forestry.
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We should be building with wood more, instead of with cement. Then our buildings become co2 storage.
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Experts often discount the importance of building with wood, pointing out that these days wooden buildings often get torn down in a few decades, making the carbon capture much less than permanent. I suppose you could argue that it's still better than nothing!
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Not only is that impossible, it's undesirable. Plants need for lots of CO2 to be in the air. If you'd like to see worldwide famine, keep removing the CO2. Meanwhile solar output continues to wane and we're about to enter a mini ice age. {facepalm}pic.twitter.com/wCoRlN9scj
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Speaking of facepalm, look at pp. 688–690 of the IPCC WG1 AR5. Solar irradiance has, if anything, increased slightly in the past century. That is fully incorporated into climate models (one of many climate forcings) and pales in comparison with human influence.pic.twitter.com/9gawHJ6q6O
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I recall my "moment of truth" in regards to
#PeakOil theory when I heard the world consumes a cubic mile of oil every year. We need to ween ourselves off fossil fuels for reasons of depletion and CO2 releases. Reduction beats trying to "lock the barn when the horse is stole". -
I start my article by saying reduction is the most important thing. Then I point out most scenarios where we stay below 2C warming now require negative carbon emissions after 2050... and why relying on these is very dangerous. The magazine did not include this important graph:pic.twitter.com/J9FFWTcwX2
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Enhanced ocean-beach weathering of olivine:https://projectvesta.org/
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Yes, the advantage of this is that it doesn't require power to carry out the chemical reaction. The disadvantage is that one needs to dig up gigatonnes of rock and grind it up - to really do a lot of good the amounts would need to exceed current mining for cement manufacture.
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