Bold Ideas from Geo-Engineers

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Radical solutions to global warming range from a man-made volcano that shoots gigatons of light-reflecting sulfates into the air to a forest of artificial "trees" to absorb carbon dioxide. Will these ideas come to fruition?

STEVE INSKEEP, host:

All right. Just in case solar energy does not stop global warming in time, scientists are coming up with more radical solutions. Our last word in business today is geo-engineering. Scientists have talked about tinkering with the earth for decades, but they downplayed their ideas, fearing that quick fixes would discourage politicians and consumers from making harder changes needed to cut down on energy use.

Radical solutions, though, to global warming are now coming out in the open - like the manmade volcano that shoots gigatons - gigatons - of sulfates up into the air. That's a lot. Another idea is placing trillions of little reflectors between the sun and the earth to lower the planet's temperature. And then there is the forest of artificial trees that would suck carbon dioxide out of the air. It is unclear if any of these ideas will come to fruition, but one scientist says they should be researched, just as an insurance policy.

This is your source for gigatons of reflective news. MORNING EDITION from NPR News. I'm Steve Inskeep.

RENEE MONTAGNE, host:

And I'm Renee Montagne.

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