One day, hopefully not soon, Earth may be as inhospitable as Mars. Earth may be really, really uninhabitable within 100 years or so, if we are not careful as a

One day, hopefully not soon, Earth may be as inhospitable as Mars. Earth may be really, really uninhabitable within 100 years or so, if we are not careful as a species. We must manage this planet, or it is the end of our time in the universe. Going to Mars makes a lot of sense to some fairly capable folk. Getting there, and sustaining life, is going to be hard. But, we will make it easier eventually. I can think of a way we could turn Earth into a recovering paradise, full of natural wonder, and it would definitely involve using Mars to fix it.