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A comment on Climate change: IPCC report is 'code red for humanity'. Parent comment
1400 degree to make the cement part of concrete.
You could may be reach this by solar concentration, but currently we do burn stuff to make concrete.
https://en.wikipedia.org/wiki/Joule_heating
1400 degree to make the cement part of concrete.
You could may be reach this by solar concentration, but currently we do burn stuff to make concrete.