Obama Looking at Cooling Air to Fight Warming - ABC News
The conservative think tank American Enterprise Institute has its own geoengineering project, saying it could be "feasible and cost-effective." And Cato Institute scholar Jerry Taylor said Wednesday: "Very few people would rule out geoengineering on its face."
Holdren didn't spell out under what circumstances such extreme measures might ever be called for. And he emphasized they are not something to rely on.
"It would be preferable by far," he said, "to solve this problem by reducing emissions of greenhouse gases."
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