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I 1 RAUL Row Los Angeles Times FIREWORKS and downtown L.A.are seen from Whittier in this 21-second expo- sure.Fireworks emit high levels of particulate matter and metal air pollutants. Fallout from the, fi reworks: health air Dirty, un y r The South Coast Air basin that are primarily Officials warn of Quality Management Dis- caused by motor vehicles,as trict issued a particulate ad- well as fugitive dust and in- particulate pollution visory through Tuesday for dustrial emissions." in much of Southland much of Southern Califor- The advisory warned ul nia,from Los Angeles to the that using personal or back- after Fourth of July. Coachella Valley,because of yard fireworks"may lead to fireworks, which emit high localized fine particulate BY GRACE TOOHEY levels of particulate matter matter concentrations and metal air pollutants. above observed regional lev- Air quality dropped con- "Fine particulate matter els." siderably after hundreds of levels on July 4 and July 5 are Fireworks on the previ- Fourth of July firework typically among the worst ous two Fourths of July set shows and smaller sets days of the year in the South record-high air pollution lev- lighted up skies across the Coast Air Basin,"the advi- els for the holiday. Los Angeles region Monday sory said. "The smoke and As of Tuesday afternoon, and remained at unhealthy combustion products from the aftermath from this levels into Tuesday morning fireworks add to the fine par- year's fireworks didn't yet for many areas. ticles already present in the [See Air,B5]