The Best Way to Shade Earth
Scientific American reported on ACOM scientist Simone Tilmes' experiments with geoengineering. The eruption of Mt. Pinatubo in June 1991 demonstrated that sulfur aerosols have a cooling effect by shading the earth's surface. The study found that harmful side effects (droughts, extreme rainfall) could be minimized by injecting particles into the atmosphere by airplane at 15° north latitude and 30° south. Those latitudes away from the equator provide better atmospheric mixing.