zero

Rising sea levels will be an inconvenience to all Extreme whether events will be an inconvenience to most and life threatening to some Dying crops could kill us all. Hungry people get desperate, turn violent. More and more, those nukes will start looking like a viable option.

bc that isnt going to make it easier for them to eat xD

consider a scenario though where (for the sake of simplicity) we have an america and an africa. increase in temp makes growing crops near impossible in africa. the most disadvantaged become more so. they are starving, and so they turn to violence to steal food from usa

now imagine the usa does not have enough for both nations to eat. they can no longer import crops from africa that helped sustain them. their people are beginning to go hungry too. the homeless are hit hardest first. crime goes up there too.