> We already know how to stop climate change (rapidly decrease our CO2 output) Yes, but we don't know how to do that. The technology exists now in many domains

> We already know how to stop climate change (rapidly decrease our CO2 output) Yes, but we don't know how to do that. The technology exists now in many domains; with adequate public will and money we could probably rapidly electrify surface transportation, for example, and maybe electricity production (though long-duration storage is probably still a ways from production readiness), but the technology to produce concrete or aluminum without emissions just doesn't exist yet at anything other than (at best) the concept stage. Likewise for trans-oceanic shipping, or long-haul aviation, or fertilizer production, or... (etc., etc.). People think first about cars and electricity because they're tangible in people's daily lives, but industrial CO2 is a big, very much not-yet-solved problem. Work is absolutely happening in all of these domains, but it will take time and resources, and we don't know which efforts will or won't succeed, or if any will succeed fast enough to meet IPCC targets for keeping warming below 1.5C without carbon capture as well.