How do you combat global warming?

We are close to making human gills a reality.

So you mean to tell me that they have managed to make a respiratory system that can allow someone to breathe both on land and in water? Because a halfway piont wont work, in fact, it would make both water and air poisonous to you. And merely having gills doesn't let you breathe water, that's a such a big misconception that even a black mans penis can't match it in size.