Keywords: Space lens.png Principle of a space lens The basic function of a space lens to mitigate global warming In reality a 1000 kilometre diameter lens is enough and as a w Frensel lens only a few millimeters thick much smaller than simplified in image Including the following image Image The Earth seen from Apollo 17 jpg also public domain licensed 2008-04-19 Mikael Häggström User Mikael Häggström Check categories 2008 November 25 en wikipedia Solar_shade Environmentalism Global warming Environmentalism Space colonization |