Anyway you slice it we are grateful for you11/18/2023 ![]() By extension, you're changing which industries may be in competition with each other (or end up being completely obsolete), and which companies may end up having an advantage. If you change the rules of the game, you change the winning strategies. This is on top of the fact that they can already consume more anyway, which is to say, I have one car, but the very wealthy might collect them (buying new! another thing I've never done), and just the process of manufacturing a new car releases more CO2 than I could produce in several years of driving. The very wealthy are able to afford to not go through the same public channels as the rest of us, and so their emissions don't get amortized over vast numbers of users. able to travel more often via normal means, while occasionally also taking the jet for a spin). ![]() on top of elevated normal consumption (i.e. Then you have emissions associated with luxury yachts, helicopter rides, private jets, etc. For arguments sake, the emissions of such a tunnel would be ludicrous when you calculate on a per person basis. Now I don't know if he ever did that, but it's not particularly far fetched for someone with his resources to do. Obviously Elon Musk can't eat orders of magnitude more beef than the rest of us, but in 2017 he announced that the boring tunnel would dig a tunnel directly to his house. ![]() * People who have been to Burning Man can testify to just how much trouble dust that small causes, not to mention the frequent dust storms with zero visibility. I suspect that once one does the math on the whole lifecycle, it's net carbon positive only after decades if it is to be done safely. It'd have to be combined with a binder to form much larger particle sizes so that the natural weathering safely exposes the olivine slowly over decades. That's safe in a controlled industrial environment with everyone using fitted respirators but spread out on fields exposed to wind, near residential areas? Dumping that much fine dust everywhere would probably create a similar hazard to the dried out beds of the Great Salt Lake or the Salton Sea or Blackrock Desert* except everywhere there is farmland. Make it any smaller and it'll be well into the asbestos size range, which would probably be carcinogenic based on the mechanical damage it causes alone (a lot of nanoparticles are toxic for this reason). That's about the size of gypsum dust used in drywall and you can't cut or sand or do anything without PPE for long without serious health consequences. I think the second "gotcha" is that even at 83 microns, that particle size is likely unsafe. Potential and costs of carbon dioxide removal by enhanced weathering of rocksĮnvironmental life cycle assessment of CO2 sequestration through enhanced ![]() Transport is electrifying and so is the grid that powers those vehicles, therefore in the long run you can assume these will become more and more efficient. One tonne of olivine removes more than 1 tonne of resultant carbon based on its Mg cation content. With ultramafic and mafic rocks, you can have huge continuous bodies of these minerals, with very high usage and efficient ratio. One thing you seem to be missing coming from the copper world is that the ore for copper is very low percentage of copper and has a maybe 3:1 stripping ratio, so you need to mine and grind and use 300-400 tonnes to get 1 tonne of copper out. "A life cycle assessment (LCA) about the potential of basaltic rocks for enhanced weathering and soil carbonation (Section 5.1.) found transportation (related to the distance between the quarry and the place of application) as the major process negatively affecting CO2 sequestration, whereas grinding had less effects on the CO2 budget, which could however be related to the relative coarseness (<5 mm) of the particles."Ī lot of companies doing this use fines or waste material, but it can still be done efficiently. I don't know why you have to "suspect," when you can read the linked papers or any others.
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