Can We Block the Sun to Stop Climate Change

Solar radiation management (SRM), or solar geoengineering, is a type of climate engineering in which sunlight (solar radiation) is reflected to limit or reverse global warming. Proposed methods include increasing the planetary albedo, for example with stratospheric sulfate aerosol injection. Restorative methods have also been proposed regarding the protection of natural heat reflectors including sea ice, snow, and glaciers. Their principal advantages as an approach to climate engineering is the speed with which they can be deployed and become fully active, their low financial cost, and the reversibility of their direct climatic effects.