As a source of pollutants born naturally, like a volcanic eruption. Cause dust, sulfur dioxide. Forest fires cause smoke, dust, hydrocarbons, carbon monoxide caused by such plants.(Ch4) pollen.Are naturally radioactive, radioactive substances from soil being swept up suspended in the air, dust from wind storms. Natural gas, motion sensor pads, etc. are all toxic air, for example, when the Act was2525 el chichon (Episcopalian Chul) in Mexico. Legacy ashes, dust explosion caused sulfur dioxide diffusing in the atmosphere is about 29 kilometers the appearance of clouds. Fog covered the area with more than 1 in 4 of the Earth's surface.Japan, Indian Ocean, Hawaii, USA Including Thailand, S. and North Africa Meteorologists believe that these ashes are obscured radiation from the sun, 10% have resulted in such a temperature decrease.
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