The proportion of hazardous metal toxins in PM2.5 in Beijing has decreased for the past three years, which experts lauded as the initial achievement of the city's anti-smog measures.
The ratios of three carcinogenic heavy metals – arsenic, lead and cadmium - in the PM2.5 of the city's air have dropped by 85.9%, 48.9% and 40.7% respectively, according to a report jointly released by Pan Xiaochuan, a professor from the School of Public Health with Peking University, and an environmental organization.
Beijing has closed three coal power plants since 2014, and the density of the sulfur dioxide discharged from coal burning dropped 49 percent compared with the data from 2013.
Dong Liansai, director of the environmental organization, said that the decrease of the density of arsenic and sulfur dioxide shows the government's measures to cut air pollution are working.
However, Dong noted that there are still other carcinogenic substances in the PM 2.5 that are harmful to human health.
But Net users were not so impressed by the decrease of hazardous substances in the air with some mocking that the smog has now become "environmental-friendly."