With a decreasing trend to surrounding areas, the concentration in Puxi is generally higher than that in Pudong [ 6 ]. 2.5.
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The sentences
With joint efforts, Shanghai smoke and dust emissions from 115,400 tons/year in 2003 dropped to 47,000 tons/year in 2017; the total emission of exhaust gas sulfur dioxide decreased from 435,400 tons/year in 2003 to 18,500 tons/year in 2017; especially beginning from 2013, the total amount of industrial waste gas and sulfur dioxide emissions began to decrease significantly, and the number of days with good ambient air quality and the good rate showed a trend of improvement.