What we could do is attempt to develop (air conditioned) domes or underground dwellings, hydroponics and water sparing farming. (Incl. GMO, to hell with greens

What we could do is attempt to develop (air conditioned) domes or underground dwellings, hydroponics and water sparing farming. (Incl. GMO, to hell with greens on that.) That would cushion the blow a lot. Catalog and save the species we still can, like corals. Trying to sequester CO2 and CH4 unfortunately won't work well on big scales.