BOULDER, Colorado, Aug. 23 (TNSres) -- The National Center for Atmospheric Research issued the following news release: * * * New paper focuses on feasibility and impacts of Earth-cooling stratospheric aerosol injection * * * Scientists for several years have studied the theoretical effectiveness of injecting sulfur dioxide into the stratosphere to reflect heat from the Sun and offset Earth's warming temperatures. But they also want to ensure that the solar geoengineering approaches being stu  more