By Kevin Petersen, Nick DeWier, Adam Contreras
What Are the Causes of Global Dimming?
The primary causes for global dimming range from natural to artificial.
TSAR BOMB. Nuclear explosion
In the 1950s, various government and commercial groups began exploring whether it would be possible to “seed” clouds with silver iodide smoke and other substances in order to control local weather. This had very limited success. But they prompted suspicion, borne out decades later, that human pollution was inadvertently creating clouds that intercepted sunlight and impacted the climate of a broad region.
Dimming appears to be caused by air pollution. Burning coal, oil and wood, whether in cars, power stations or cooking fires, produces not only invisible carbon dioxide, but also tiny airborne particles of soot, ash, aerosols, sulfur compounds and other pollutants. These aerosols and other pollutants absorb solar energy and reflect sunlight back into space. Because of this, if they were to be in large numbers of bigger clouds covering the earth, sunlight would be completely reflected off into space