Man-made particles lowered hurricane frequency: study
Higher levels of air pollution reduced the frequency of North Atlantic hurricanes and other tropical storms for most of the 20th century, a study said Sunday.
Adding to evidence for mankind's impact on the weather system, the probe found a link between these powerful storms and aerosols, the scientific term for specks of matter suspended in a gas.
Aerosols can occur in natural form -- as dusty volcanic plumes, clouds or fog -- but are also man-made, such as sooty particles from burning coal or oil.
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