Here's How We Can Turn the Red Planet into Earth 2.0

In the event of a catastrophe on the same scale as the astroid impact that wiped out the dinosaurs, mankind's best chance may lie in off world colonies. Due to its similarities to Earth, many scientists think Mars is a viable candidate for terraformation. We already know that the planet is within the habitable zone. So, what would it take to make it habitable? A 1000+ year planetary engineering project.
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