6. Experimental Results 1982 El ChichonEruption: 7 million metric tons of SO2 caused global cooling of 0.3°C. 1991 Pinatubo Eruption: 20 million metric tons of SO2 caused global cooling of 0.5°C 1815 TamboraEruption: Largest eruption in recorded history released unknown amount of SO2. Global Cooling of about 3°C. Data from U.S Geological Survey
7. Methods of Climate Engineering Send aerosol into earth’s atmosphere using balloons, artilleries, or airplanes.