Pollution battle reaching new level as air gets clearer

Beijing’s environmental watchdog has vowed to further bolster cross-regional control of air pollution and to better manage pollution sources at a more detailed level as the capital saw continuous improvement of its air quality in 2018.

Pollution battle reaching new level as air gets clearer

The capital saw the average density of PM2.5 particulate matter drop by about 12 percent year-on-year to 51 micrograms per cubic meter in 2018, said Liu Baoxian, deputy head of the environmental monitoring center at the Beijing Municipal Ecology and Environment Bureau. Liu spoke at a news conference on Friday.

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Other major air pollutants also decreased. The concentration of sulfur dioxide, for example, stood at 6 mg per cubic meter, down by 25 percent from 2017. Its density remained below 10 mg/cu m, even during the cold months when the increased need for heating can drive up pollution, Liu said.

The number of days with heavy pollution in the capital dropped from 58 in 2013 to only 15 last year. The past year also saw 195 consecutive days without heavy air pollution, 108 more than 2013.

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Shi Aijun, deputy head of Beijing Municipal Research Institute of Environmental Protection, said PM2.5 density in the capital peaked at 244 mg/cu m in 2018, down by 46 percent year-on-year.

Xing Jia, associate professor from the School of Environment, Tsinghua University, said their research and calculations showed about half of the capital’s air quality improvement in the past five years came from reduction of local emissions.

While favorable meteorological conditions contributed 30 percent of the improvement, decrease of pollutant discharges in nearby regions also helped, Xing said.

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In Hebei province, the PM2.5 concentration dropped 12.5 percent last year, according to preliminary results from the provincial environmental authority.

Almost 1.8 million households in the province turned to natural gas and electricity as heating sources instead of highly polluting coal. Almost 6,500 coal-burning boilers with a capacity of about 12,700 metric tons of steam energy were eliminated in 2018.

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