That wasn't specified. It can be done without fossil fuels, of course. If I unde... | Hacker News

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		pfdietz on Aug 23, 2023 \| parent \| context \| favorite \| on: Coffee grounds make concrete 30% stronger That wasn't specified. It can be done without fossil fuels, of course. If I understand correctly, it doesn't require more heat energy than the conventional process starting from limestone.

hkt on Aug 24, 2023 [–]

Solar thermal panels can be used for this!

pfdietz on Aug 24, 2023 | [–]

The temperature required is quite high (> 1000 C) so they would have to be highly concentrating and tracking.

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