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20 17 has the number of days of heavy pollution in Beijing dropped to the lowest level in recent five years?
According to reports, a few days ago, the person in charge of the Beijing Municipal Environmental Protection Bureau said that from the calendar of fine particulate matter (PM2.5) in Beijing in the past five years, the number of days of heavy pollution in Beijing has decreased year by year, and the overall decline has exceeded half. From 58 days in 20 13 to 2 1 day since 20 17.

According to the circular, the person in charge said that since the winter of this year, there has been no serious air pollution in Beijing, and the frequency and degree of heavy pollution are the lowest in the past five years. In 20 17, Beijing set a record of no heavy pollution of PM2.5 for continuous 173 days. Since the winter of this year, there have been only four days of heavy pollution, and there is no serious pollution. The frequency and degree of heavy pollution are the lowest in the past five years.

The monitoring data showed that the meteorological conditions were unfavorable in June, 5438+ 10 and February this year, and the average concentration of PM2.5 in Beijing rose by 70% year-on-year. However, from March to June, the monthly average concentration reached the lowest in the same period in history (September was the second lowest in the same period in history). Since April, the average monthly concentration of PM2.5 in Beijing has been below 60 micrograms per cubic meter.

I hope the air environment in Beijing can continue to improve!