Planting a man on its surface required no big technological innovations, says Mr Logsdon,“just very expensive mastery over nature using the scientific and technological knowledge available in 1961”.

把人送到月球表面并不需要太大的技术投入，用劳杰斯特的话说，“用60年代的科学技术去征服自然，只不是非常昂贵罢了”。

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Planting vegetation on rooftops also reduces surface temperatures.

又如在房顶上种植蔬菜也可以降低地表温度。

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Planting a man on its surface required no big technological innovations, says Mr Logsdon, "just very expensive mastery over nature using the scientific and technological knowledge available in 1961".

将人送往月球表面并不需要太大的技术革新，罗杰斯顿说，“只是用1961年的科学技术知识来完成这次对自然的征服将是花费巨大的。”

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This may be achieved by increasing the surface reflectivity of the planet, for example by brightening human structures, planting crops with a higher albedo, or covering deserts with reflective material.

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So planting trees in these climates actually has the net effect of warming the Earth's surface.

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