Global Warming Believers... A quick Question...?

Even at 1 degree increase a year, all of humanity would die within the next 20 years. This is due to a melting of the polar ice caps which will drastically rise sea levels and therefore drown any life on the coasts of countries. Slowly, crops will lose the ability to grow and humans won't be able to bear the heat, and we will die. This is only if improvements are not made.