[Daishiman]

Drought and flooding happening in many places in the world destabilizing grain prices.

Agricultural risks consolidating ag into even more megacorps.

Insurance costs making a lot of currently habitable places uninsurable, and after a few natural catastrophes nobody willing to settle in them.

Wet-bulb temperatures making the deaths of a few hundred thousands of people a frequent occurrence in many parts of the world.

Marine die-offs making the source of cheap high-quality protein in many places no longer accessible and lowering nutrition in several human populations.