This article by Indrajit Samarajiva is a must read. Is there really no hope? We are going to be hearing more about geoengineering, that's for sure, but there are serious problems with that approach. You might chech out the two big ideas: carbon-dioxide removal (CDR) and solar radiation management (SRM).
https://indica.medium.com/we-have-no-hope-of-stopping-climate-collapse-2b4bdf6b9054
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