Carnegie Mellon University’s geoengineering expert, Jay Apt, and his group have recently put up with a price on the plan of spraying aerosol into stratosphere in order to reflect more solar radiation back into space. In fact, this proposal has been controversial for a long while. Other than the issue of expense, the environmental and political risks that will be produced by this plan remain unsolved. The following documentary entails the story.

Read more at Cost analysis of stratospheric albedo modification delivery systems