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The terraforming of Venus is the theoretical process of engineering the global environment of the planet Venus in such a way as to make it suitable for human habitation. Terraforming Venus was first seriously proposed by the astronomer Carl Sagan in 1961, although fictional treatments, such as ''The Big Rain'' by Poul Anderson, preceded it. The minimum adjustments to the existing environment of Venus to support human life would require three major changes to the planet. These three changes are closely interrelated, because Venus's extreme temperature is due to the greenhouse effect caused by its dense carbon-dioxide atmosphere: *Reducing Venus's surface temperature of . *Eliminating most of the planet's dense carbon dioxide and sulfur dioxide atmosphere, via removal or conversion to some other form. *Addition of breathable oxygen to the atmosphere. ==Solar shades== Venus receives about twice the sunlight that Earth does, which is thought to have contributed to its runaway greenhouse effect. Terraforming Venus would probably involve reducing the insolation at Venus's surface to prevent the planet from heating up again. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Terraforming of Venus」の詳細全文を読む スポンサード リンク
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