Yay so when we finally finish destroying our planet we can get started on another one!
Well, if we do go to Mars to live, we will have to get the planet to warm up a bit, since it doesn't have the dense atmosphere we do. We will have to do the whole global warming thing there like we are doing here, but it will help on mars. Build an atmosphere, heat the planet and make it almost livable. But that is going to take a while anyway.
So yes, we would get started there, but it would help instead of hurt.