If we could solve the problems of colonizing Mars, we'd long be in a position of solving the problems of keeping Earth habitable. I mean, by all means, let's t

If we could solve the problems of colonizing Mars, we'd long be in a position of solving the problems of keeping Earth habitable. I mean, by all means, let's try for multiplanetary, but it's not an answer for "if we miss a sustainable path here". It'll require a function Earth for a long long time.