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Artificially cooling Earth is a 'highly risky strategy,' researchers warn

Artificially cooling Earth is a 'highly risky strategy,' researchers warn

Science
Nov. 14 (UPI) -- Some scientists and policy officials have proposed artificial cooling as a solution to global warming. But a new study suggests any such efforts would present serious risks.One of the most popular forms of geoengineering is the manipulation of clouds, using aerosols to promote cloud formation and cloud brightening. Higher concentrations of clouds -- and brighter clouds -- can help reflect sunlight and reduce warming.The introduction of large amounts of aerosols into the atmosphere by volcanic eruptions has in the past triggered periods of global cooling.But new analysis at the University of Exeter showed such geoengineering efforts could have unintended consequences. An influx of aerosols in the atmosphere in the Northern Hemisphere, for example, would be likely to encoura...