We could always Terafarm Mars
Best Way to Make Mars Habitable: Inject Greenhouse GasFri Feb 4, 9:19 AM ET Science - Space.com
Robert Roy Britt
Senior Science Writer
SPACE.com
The best way to make Mars habitable would be to inject synthetic greenhouse gases into its atmosphere, researchers said Thursday.
The stuff could be shipped to Mars or manufactured there.
Scientists and science-fiction authors have long pondered terraforming Mars, melting the vast stores of ice in its polar caps to create an environment suitable for humans. The topic is highly controversial.
Some think earthlings have no right to mess with the climate of another planet. Others see Mars as a refuge for people who might need to flee this world as conditions deteriorate. Another argument holds that Mars was likely warmer and wetter in its distant past, and it might have harbored life, so bringing it back to a previous state makes sense.
