Industrial pollution is the biggest source of the PM 2.5 problems which cause Beijing's smog, the Chinese Academy of Sciences said on Monday.
Chinese lawmakers Thursday urged not to adjust environmental targets though the progress toward four of them is considered slow.
Pollution caused together by particulate matters, sulfur dioxide and nitrogen dioxide has nearly halved the number of good air quality days in November compared with October in the Yangtze River Delta region, the Ministry of Environmental Protection reported on its website.
Chengdu, capital of Sichuan province, will release a heavy pollution weather emergency plan before 2014 to cope with worsening weather conditions in the city.
China needs to invest 1.75 trillion yuan ($290 billion) for its air pollution treatment plan from 2013 to 2017, an environment expert has estimated.
China has introduced various emergency responses and long-term measures against air pollution in the central and eastern regions.
Wuhan, the capital city of Hubei province, has issued smog warnings for three days since Monday because of serious air pollution.
More than half of Beijing's national-level meteorological stations are not functional, China News Service reported on Wednesday.
Authorities in Heilongjiang province vowed on Monday to try to get rid of heavy pollution in 2017.
Haidian district in Beijing plans to remove all high-polluting enterprises by the end of 2017 in order to improve its air quality, Beijing Morning News reported on Monday.
Local governments in eight cities in Liaoning province have been fined a total of 54.2 million yuan ($8.9 million) for air pollution.
The smog that blanketed over 100 cities in half of China last week has rekindled criticism of insufficient efforts in the fight against air pollution.
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