| http://www.w3.org/ns/prov#value | - The project would start with an expedition from earth, which would arrive at Mars between the years 2015 (twenty fifteen) and 2030 (twenty thirty).During the second fifty-year stage, mirrors made of the plastic Mylar would reflect the rays of the sun to the polar ice caps, which, sprinkled with powdered coal, would liberate gases such as carbon dioxide, oxygen, nitrogen, and water from the crust o
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