Questionnaire survey was taken,the plant-caused pollution in 4 typical cities including Beijing,Hefei,Chengdu and Guangzhou was *** of three kinds of plant-caused pollution such as pollen,flying hair and catkin,and sm...
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Questionnaire survey was taken,the plant-caused pollution in 4 typical cities including Beijing,Hefei,Chengdu and Guangzhou was *** of three kinds of plant-caused pollution such as pollen,flying hair and catkin,and smell between different cities and different people were *** results are as follows:the plant-caused pollution has obviously regional distribution *** rate of plant-caused pollution is 5.72% in Beijing,0.59% in Chengdu,2.12% in Hefei and 2.11% in *** order of the number of three kinds of plant-caused pollution allergen is pollen>flying hair and catkin>*** allergen caused by pollen and flying hair and catkin gathers largely in March to *** allergen caused by smell gathers largely in *** whole condition of the allergen is female>male,and most of them are 20 to 50 years *** results provide basis for the further research,and are also helpful for prevention of plant-caused pollution in urban area.
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