“the biggest enemy is convenience.

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

You forget how to do.

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David keith leads the climate systems.

Paulson school of engineering and applied sciences and a.

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

He says the benefits would outweigh the danger.

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

Webcalifornia state university, monterey bay

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