Some plutocrats are drawn to geoengineering schemes to try to compensate for our CO2 emissions.

The sulfate scheme is toxic and fails to prevent the other harm done by CO2: ocean acidification, which can kill a large fraction of the life in the oceans.

Removing CO2 by fertilizing plankton would prevent both problems. It might be better than allowing the disaster to happen.

However, we could still probably prevent the disaster through renewable energy, which would be better than stopping it using drastic measures.