UV-blocking aerosols may curb global warming: Harvard-Yale study
A study led by scientists from Harvard and Yale University has proposed spraying Sun-dimming chemicals into the Earth's atmosphere to cut the rate of global warming by half. The geoengineering technique, known as Stratospheric Aerosol Injection, could cost about $2.25 billion a year over a 15-year period, the study said. The chemicals could be sprayed using high-altitude aircraft, it added. 