Smog, or smoke fog, is a type of intense air pollution. The word "smog" was coined in the early 20th century, and is a portmanteau of the words smoke and fog to refer to smoky fog due to its opacity, and odor. The word was then intended to refer to what was sometimes known as pea soup fog, a familiar and serious problem in London from the 19th century to the mid-20th century. This kind of visible air pollution is composed of nitrogen oxides, sulfur oxide, ozone, smoke and other particulates. Man-made smog is derived from coal combustion emissions, vehicular emissions, industrial emissions, forest and agricultural fires and photochemical reactions of these emissions.
Heilongjiang is a province in northeast China. The standard one-character abbreviation for the province is 黑. It is the northernmost and easternmost province of the country and contains China's northernmost point and easternmost point.
Changchun is the capital and largest city of Jilin Province in China. Lying in the center of the Songliao Plain, Changchun is administered as a sub-provincial city, comprising 7 districts, 1 county and 3 county-level cities. According to the 2020 census of China, Changchun had a total population of 9,066,906 under its jurisdiction. The city's metro area, comprising 5 districts and 1 development area, had a population of 5,019,477 in 2020, as the Shuangyang and Jiutai districts are not urbanized yet. It is one of the biggest cities in Northeast China, along with Shenyang, Dalian and Harbin.
Xinxiang is a prefecture-level city in northern Henan province, China.
Qiqihar is the second-largest city in the Heilongjiang province of China, in the west central part of the province. The built-up area made up of Longsha, Tiefeng and Jianhua districts had 959,787 inhabitants, while the total population of the prefecture-level city was shrinking to 4,067,489 as of the 2020 census. These are mainly Han Chinese, though the city is also home to thirty-four minorities including Manchus, Daur, and Mongols.
Jilin City, alternately romanized as Kirin, is the second-largest city and former capital of Jilin province in northeast China. As of the 2020 census, 3,623,713 people resided within its administrative area of 27,166.37 square kilometres (10,488.99 sq mi) and 1,895,865 in its built-up area consisting of four urban districts. A prefecture-level city, it is the only major city nationally that shares its name with its province.
Baicheng is a prefecture-level city in the northwestern part of Jilin province, People's Republic of China, bordering Inner Mongolia to the north and west and Heilongjiang to the east and northeast. At the 2010 census, 2,033,058 people lived within its administrative area of 25,683 km2 (9,916 sq mi).
The Jilin chemical plant explosions were a series of explosions which occurred on November 13, 2005, in the No.102 Petrochemical Plant in Jilin City, Jilin Province, China, over the period of an hour. The explosions killed six, injured dozens, and caused the evacuation of tens of thousands of residents.
The Air Pollution Index is a simple and generalized way to describe the air quality, which is used in Malaysia. It is calculated from several sets of air pollution data and was formerly used in mainland China and Hong Kong. In mainland China the API was replaced by an updated air quality index in early 2012 and on 30 December 2013 Hong Kong moved to a health based index.
Pollution in China is one aspect of the broader topic of environmental issues in China. Various forms of pollution have increased as China has industrialised, which has caused widespread environmental health problems.
Air pollution in Hong Kong is considered a serious problem. In 2004, visibility was less than eight kilometers for 30 per cent of the year. Cases of asthma and bronchial infections have soared due to reduced air quality. However, in recent years, the hours of reduced visibility in Hong Kong have decreased by significant amounts compared to the previous ten years.
Harbinxi (West) railway station is a railway station on the Jingha Railway and the Harbin–Dalian section of the Beijing–Harbin High-Speed Railway. It is located in Harbin, in the Heilongjiang province of China.
Particulates – also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) – are microscopic particles of solid or liquid matter suspended in the air. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone. Sources of particulate matter can be natural or anthropogenic. They have impacts on climate and precipitation that adversely affect human health, in ways additional to direct inhalation.
Under the Dome is a 2015 self-financed Chinese documentary by Chai Jing, a former China Central Television journalist, concerning air pollution in China. It was viewed over 150 million times on Tencent within three days of its release and had been viewed a further 150 million times by the time it was taken offline four days later.
The 2013 Eastern China smog was a severe air pollution episode that affected East China, including all or parts of the municipalities of Shanghai and Tianjin, and the provinces of Hebei, Shandong, Jiangsu, Anhui, Henan, and Zhejiang, during December 2013. A lack of cold air flow, combined with slow-moving air masses carrying industrial emissions, collected airborne pollutants to form a thick layer of smog over the region. Levels of PM2.5 particulate matter averaged over 150 micrograms per cubic metre; in some areas, they were 300 to 500 micrograms per cubic metre.
The air quality in Delhi, the capital territory of India, according to a WHO survey of 1,650 world cities, and a survey of 7,000 world cities by the US-based Health Effects Institute in August 2022, is the worst of any major city in the world. It also affects the districts around Delhi. Air pollution in India is estimated to kill about 2 million people every year; it is the fifth largest killer in India. India has the world's highest death rate from chronic respiratory diseases and asthma, according to the WHO. In Delhi, poor quality air irreversibly damages the lungs of 2.2 million or 50 percent of all children.
Air pollution in Taiwan is mostly derived from sources of domestic combustion, primarily the burning of fossil fuels. Taiwan's topography has been noted to be a contributing factor to its air pollution problem, leading to poor dispersal and trapping pollutants. Taipei, Taiwan's capital and largest city for example, is surrounded by mountains, and other industrial centers along the northern and western coasts of Taiwan are surrounded by high mountains.
Brother Nut is an internationally-known performance artist based in Beijing, China. He is known only by his pseudonym, 坚果兄弟, which is also sometimes translated in English as "Nut Brother." He was born in Shenzhen, Guangdong in 1981.
Smog towers or smog free towers are structures designed as large-scale air purifiers to reduce air pollution particles (smog). This approach to the problem of urban air pollution involves air filtration, and removal of suspended mechanical particulates such as soot, and requires energy or power. Another approach is to remove urban air pollution by a chimney effect in a tall stack, or updraft tower, which may be either filtered or simply released at altitude as with a solar updraft tower, and which may not require operating energy beyond what may be produced by the updraft.
The 2021 East Asia sandstorm was a meteorological phenomenon that began in the Eastern Gobi desert steppe on March 14, and subsequently spread to the entire Mongolian Plateau South, the Loess Plateau, the North China Plain and the Korean Peninsula. It was caused by strong northwest winds coming in from Mongolia, as a result of hot and dry conditions.
