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vog
Vog is a form of air pollution that results when sulfur dioxide and other gases and particles emitted by an erupting volcano react with oxygen and moisture in the presence of sunlight. The word is a portmanteau of the words "volcanic", "smog", and "fog". The term is in common use in the Hawaiian islands, where the Kīlauea volcano, on the Island of Hawaii (aka "The Big Island"), has been erupting continuously since 1990. Based on June 2008 measurements, Kīlauea emits 2,000–4,000 tons of sulfur dioxide every day.
==Description==
Vog is created when volcanic gases (primarily oxides of sulfur) react with sunlight, oxygen and moisture. The result includes sulphuric acid and other sulfates.〔("Sulfur Dioxide" ) on US Environmental Protection Agency web site〕 Vog is made up of a mixture of gases and aerosols which makes it hard to study and potentially more dangerous than either on their own.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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