85% of the prehistoric time earth was like that, its called greenhouse earth or acyrogenic climate. Dinosaurs lived when it was around 10 degrees hotter, and they did not die from that.
Right now we are living in a icehouse earth where polar caps are a thing, which is not the case in a greenhouse climate.
Right now we are living in a icehouse earth where polar caps are a thing, which is not the case in a greenhouse climate.