Terraforming would be a monumental task. How about this instead?
Humanity could make patches of the Red Planet habitable relatively cheaply and efficiently by placing thin layers of silica aerogel on or above the Martian surface, a new study suggests. The insulating aerogel would warm the ground enough to melt water ice and would also block harmful ultraviolet (UV) radiation, potentially creating an environment where plants and other photosynthetic life could flourish.
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