Webcanadian rock climber david keith is a gordon mckay professor of applied physics at harvard john a. Paulson school of engineering and applied sciences and a. “the biggest enemy is convenience. Every time something is done for you, it could cause all sorts of problems. You forget how to do. Webdavid keith wants to spray a pollutant into the sky to block some sunlight. He says the benefits would outweigh the danger. David keith leads the climate systems. Webcalifornia state university, monterey bay
