The one big problem I don't see talked about as much for some reason is ocean acidification. Given more of the surface of the planet is covered in ocean than in

The one big problem I don't see talked about as much for some reason is ocean acidification. Given more of the surface of the planet is covered in ocean than in land, and the influence the oceans have on everything, it's pretty hard not to get worried about it. One consequence that is already happening (partly due to ocean acidification, and partly due to water getting warmer) is coral reef die-offs/bleaching.