answered on 13 Mar 2020:
last edited 13 Mar 2020 3:32 pm
I think there would be a lot of natural disasters such as earthquakes and tsunamis! Think about where all that water would suddenly go? Wildlife, animals and plants, would become less diverse as not all species are suited to hot temperatures and there would probably be a lot of dispute over land boundaries!
From a genetic point of view, I think it would be pretty cool! There would be more cross-breeding between ethinic groups and that would result in more genetic variation and over many many years evolution.