CNN: Can cloud ships and space sun shades fix the planet?

In order to stop dangerous climate change we may be forced to construct giant solar shades and cover great swathes of land with artificial trees that suck up carbon dioxide.

These are the conclusions of a year-long scientific survey of “geo-engineering” technologies by the UK’s Royal Academy published earlier this year. From fake trees to cloud making ships, the ideas are designed to provide planet-scale alterations to our climate if efforts to cut emissions fail.

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