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The display of fireworks is a traditional way to celebrate very important Chinese festivals such as New Year and Lantern Festival.This study investigated the influences of firework displays on ambient air quality during the Taiwanese Lantern Festival in Kaohsiung City.Both of the organic (methane,NMHC,THC,benzene and toluene) and inorganic (NO,NO2,SO2,CO,and O3) gaseous pollutants were measured to fulfill the investigation.For organic gaseous pollutants,an increasing of THC concentration due to the firework displays was found.The concentration peaks of THC were caused mainly by the obvious increase of NMHC.The concentrations of NMHC were approximately 2.3 times higher than those during the non-firework periods.Moreover,the concentration peak of toluene during the firework periods was approximately 2.2~4.1 times higher than those during the non-firework periods,while benzene remained almost the same level as usual.For the inorganic gaseous pollutants,the concentration peaks of NO,NO2 and CO were observed during the firework displays periods.The concentrations of NO and NO2 was approximately twice and 3 times higher than those during the non-firework periods,respectively.This study further revealed that,even at nighttime,ambient O3 could be reduced dramatically during the firework periods,when as NO2 concentration increased concurrently,due to titration effects resulting from the prompt reaction of NO with O3 to form NO2 and O2.This study revealed that firework displays for celebrating the Taiwanese Lantern Festival contributes significantly high amount of gaseous pollutants to the atmosphere of Kaohsiung City.