Beijing will cut smog levels further this year by putting more new energy vehicles (NEV) on its roads, reducing diesel-fuelled truck numbers and tightening its supervision of vehicle emissions and refined oil products, the city said on Thursday.
The Beijing Municipality government also said it will aim to cut emissions in the petrochemical industry.
The Chinese capital recorded an average concentration of tiny airborne smog particles known as PM2.5 at 42 micrograms per cubic metre last year, the lowest level since the country began an anti-air pollution campaign in 2016.
Nevertheless, that PM2.5 level is still more than four times the World Health Organization's guideline of 10 micrograms per cubic metre of air.
"Beijing will make its best effort to improve air quality, with annual PM2.5 concentration and three-year average concentrations continuing to fall," the Beijing Municipality government said in a statement on Thursday.
The city said it aims to have 400,000 NEVs - plug-in hybrids, battery-only electric vehicles and those powered by hydrogen fuel cells - by the end of the year, up from the 225,000 on its roads at the end of 2018.
It aims to speed up the elimination of high-emission cars and replace diesel-fuelled trucks with NEVs, which it will use for all its postal, intra-city delivery, environmental sanitation departments and for its airport and public bus systems.