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Quotes from the news wire:
It would be better if we mitigated the effects of global warming and had cleaner air in our cities and were n’t drilling for vast amounts of coal, oil and gas in parts of the world that are problematic and will run out anyway, and if we were a multiplanetary species, that would reduce the possibility of some single event, man-made or natural, taking out civilisation as we know it, as it did the dinosaurs.
Mars is the next natural step. In fact, it’s the only planet we have a shot at establishing a self-sustaining city on, once we do establish such a city, there will be strong forcing function for the improvement of space flight technology that will then enable us to establish colonies elsewhere in the solar system and ultimately extend beyond our solar system.