More than 20 years after Beijing began looking for ways to improve air quality in one of the largest and fastest growing cities in the developing world, its successful efforts has provided a model for other cities to follow, according to a report released ahead of the UN Environment Assembly.
Research by UN Environment and the Beijing Municipal Ecology and Environment Bureau (BEE) outlines how Beijing’s air quality management programme has evolved. It also and makes recommendations for near, medium, and long-term steps that Beijing can take to maintain its momentum toward clean air.
The report, A Review of 20 years’ Air Pollution Control in Beijing, was compiled by a UN Environment-led team of international and Chinese experts over two years. It covers 1998 to the end of 2017.
He Kebin, the principal author of the report and Dean of Tsinghua University’s School of Environment, said Beijing progressed between 1998 to 2013, but that there were even more significant improvements under Beijing’s Clean Air Action Plan 2013–2017.
In 1998, air pollution in Beijing was dominated by coal-combustion and motor vehicles. Major pollutants exceeded national limits. By 2013 levels had fallen and some pollutants, like carbon monoxide and sulfur dioxides, met national standards.
In 2013 Beijing adopted more systematic and intensive measures. By the end of 2017 fine particulate pollution (PM2.5) had fallen by 35 per cent and by 25 per cent in the surrounding Beijing-Tianjin-Hebei region. Much of this reduction came from measures to control coal-fired boilers, provide cleaner domestic fuels, and industrial restructuring.
Over this period, annual emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), particulate matter (PM10) and volatile organic compounds in Beijing decreased by 83 per cent, 43 per cent, 55 per cent and 42 per cent respectively.
Beijing’s air quality management system is supported by monitoring and evaluation, pollution source apportionment and emission inventories. It also contains comprehensive legal standards and strict environmental law enforcement. Air quality work is supported by economic policies, public participation, and coordination on air pollution prevention and control in the Beijing-Tianjin-Hebei region.