hopefully never necessary ....

We started looking at this also ... not yet conclusive but it seems reasonable to look at all options, even when hoping that humanity would manage to get to reason and change our consumption and GHG emission patterns in time ...

For the past year, Angel has been looking at ways to cool the Earth in an emergency. He's been studying the practicality of deploying a space sunshade in a global warming crisis, a crisis where it becomes clear that Earth is unmistakably headed for disastrous climate change within a decade or two.

Roger Angel

Angel presented the idea at the National Academy of Sciences in April and won a NASA Institute for Advanced Concepts grant for further research in July. His collaborators on the grant are David Miller of the Massachusetts Institute of Technology, Nick Woolf of UA's Steward Observatory, and NASA Ames Research Center Director S. Pete Worden.

Space Sunshade Might Be Feasible in Global Warming Emergency