Ken Caldeira, atmospheric scientist at Stanford University's Carnegie Institution for Science, discusses whether or not geoengineering will be an unpopular solution to combating climate change. "I was at a meeting where there was a fellow there from Ghana who stood up and said, 'If we're having crop failures and we think that putting aerosols in the stratosphere can cool the weather and allow us to grow our crops, we would be all in favor of it,'" said Caldeira.