Research on the trend of environmental air quality change,ozone impact,and mitigation measures in rural areas of Hangzhou during the 13th Five Year Plan Period
Hangzhou,as an important city in the eastern coastal region of China,has been facing increasingly severe environmental air quality problems in recent years.From 2016 to 2020,the comprehensive air quality index of rural areas in Hangzhou shows an overall downward trend,with the index decreasing from 1.91 in 2016 to 1.66 in 2020.However,the concentration of O3 shows an overall upward trend,with the proportion of the primary pollutant O3 increasing from 6.5%in 2016 to 26.7%in 2020.Ozone is a highly plant toxic air pollutant that can affect the yield of major food crops such as rice,wheat,and corn.During the 13th Five Year Plan period,the grain yield per hectare showed an overall downward trend with the increase in the proportion of the primary pollutant O3.
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