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447 points Brajeshwar | 1 comments | | HN request time: 0.209s | source
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alexchamberlain ◴[] No.37372056[source]
I'm starting to wonder whether the conventional wisdom of reducing carbon emissions in favour of more electricalisation is really solving the actual problem. As is often pointed out on HN, electrical cars are substantially heavier than their fossil fueled alternatives, and generate other pollution along the way. Furthermore, we're digging our lithium brines from the environment, without really understanding what all this lithium will do once it's leached out into the environment or what impact the mines themselves will have.

With the recent advances of turning CO2 into other substances, such as propane, should we be focusing more on closing the carbon cycle and simply be producing fossil fuels from the waste products of yesteryear?

Naively, it feels like we understand C, O and H, better than we understand some of the rare metals we're now introducing in the name of climate change.

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gumby ◴[] No.37373016[source]
This question has been studied extensively for decades. a simple search should provide numerous references to referred articles in journals general (nature, science) and specialized.

And “rare earths” aren’t particularly rare, despite the term.

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1. hwillis ◴[] No.37373698[source]
there are also no rare earths in batteries. There are rare earths in computers (the same kinds in regular cars) and in neodymium magnets. lithium is not a rare earth element.