Even if all humans on the planet went to zero emissions tomorrow it is too late. We are now inside a feedback loop that will push temperature rise to +20c and sea levels up 200m or more within 200 years. Photosynthesis drops off to zero long before then. Geoengineering is the only way we don’t go extinct along with most animals.
That is just a temporary band-aid, lasting like 8 years tops. Are we going to nuke each other regularly? Do we have enough nukes for a permanent climate change? How can we make sure we have a sufficient supply of nukes for that?
