Rising temperatures is far from being our biggest problem for the foreseeable future. Raising population already creates problems that dwarf the global warming related ones, not to even mention that it is probably one of the main indirect contributors to it, and it will hit us a lot harder as it amplifies exponentially. The exploding demand for only the basic needs like food, clothes, and housing will damage nature a lot faster than global warming. By the time rising temperatures will really start hurting us we will be already killed by the multitude of complicated problems caused by overcrowding.
And while everyone is hooked into the debate around global warming no one notices the real apocalypse coming.