I don't think anyone is suggesting we stop taking care of the planet and just find a new home to exploit once the Earth is used up. All we're saying is that we

I don't think anyone is suggesting we stop taking care of the planet and just find a new home to exploit once the Earth is used up. All we're saying is that we want to explore, colonize and seek out new places. It's what human's do, and it's good for our survival as a species to become an interplanetary species. I'm sure we can do that and take are of Earth at the same time.