,,,localweather,visibility,,whichcausedthousandsofdeathsprimarilyduetopneumonia,bronchitis,tuberculosis,(Reference:,AerosolTechnology,2ndEdition,WileyInterscience)6Amount,Tg/yr[10metrictons/yr]SourceRangeBestEstimateNaturalSoildust1000-30001500Seasalt1000-100001300Botanicaldebris26-8050Volcanicdust4-1000030Forestfires3-15020Gas-to-particleconversion100-260180Photochemical40-20060Totalfornaturalsources2200-240003100AnthropogenicDirectemissions50-160120Gas-to-particleconversion260-460330Photochemical5-2510Totalforanthropogenicsources320-,volcanoaerosolemissions,andanthropogenic
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