Webdavid keith wants to spray a pollutant into the sky to block some sunlight.

Paulson school of engineering and applied sciences and a.

You forget how to do.

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Every time something is done for you, it could cause all sorts of problems.

He says the benefits would outweigh the danger.

Webcanadian rock climber david keith is a gordon mckay professor of applied physics at harvard john a.

“the biggest enemy is convenience.

Webcalifornia state university, monterey bay

David keith leads the climate systems.

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