giant sunshade

Professor Roger Angel thinks he can diffract the power of the sun by placing trillions of lenses in space and creating a 100,000-square-mile sunshade.

Each lens will have a diffraction pattern etched onto it which will cause the sun’s rays to change direction. He intends to use electromagnetic propulsion to get the lenses into space. If work was started immediately Prof Angel thinks the sunshield could be operation by 2040.

He said: “Things that take a few decades are not that futuristic.”

The Telegraph, 17 Feb 2009

see also – action plan