출처 : http : / / metro . co . uk / 2017 / 01 / 24 / what - are - the - main - causes - of - air - pollution - 6403379 / 밝 은 하늘 : 건강 문제 에 있 어 나 도 한국 사람 이 지만 적 지 않 은 우리나라 사람 들 은 흡연 문제 가 대기 오염 문제 보다 더 우리 의 건강 에 큰 해 를 끼친다고 생각 하 는 거 같 다 . 내 개인 적 생각 에 불과 하 면 참 다행 이 겠 다 . 내 가 문제 를 삼 고 싶 은 것 은 대기 오염 은 흡연 보다 덜 가시 적 이 다 . 그래서 우리 눈 에 잘 띄 는 흡연 은 우리 의 건강 에 엄청난 적 인 양 혐오 하 면서 대 기 오 몀에 대해선 그 와 유사 한 감정 을 갖 지 않 는다는 점 이 다 . 하긴 < 어쩌다 어른 > 이 란 프로그램 에서 허태균 교수 가 , 우리 나라 사람 들 은 눈 에 보이 는 거 에 크 게 신경 을 쓰 지만 눈 에 안 보이 는 것 에 는 크 게 신경 을 안 쓰 는 경향 이 있 다고 했 던 게 떠오른다 . What are the main causes of air pollution ? Imogen Groome for Metro . co . ukTuesday 24 Jan 2017 5 : 50 pmRead more : http : / / metro . co . uk / 2017 / 01 / 24 / what - are - the - main - causes - of - air - pollution - 6403379 / # ixzz 4 cemP 4 zlxAir gets polluted when gases , fumes , dust particles , smoke or odour are introduced into the Earth ’ s atmosphere , resulting in diseases , allergies and death in humans , as well as causing harm to animals and food crops . How to stay safe during a ‘ very high ’ air pollution alertPollution causes nearly 9500 deaths in London every year , and according to a 2014 WHO report , air pollution in 2012 resulted in the death of around 7 million people around the world . What are the main causes of air pollution , and how long has it been a problem ? What ’ s in polluted air ? There are many harmful substances that can pollute the Earth ’ s atmosphere , but some of the main ones are carbon dioxide , sulfur oxide , nitrogen oxide , carbon monoxide and particulates . Carbon dioxide – this is the highest form of human - caused air pollution . ( 이산화 탄소 carbon dioxide ) The burning of fossil fuels is causing a steady increase in the levels of CO 2 in the Earth ’ s atmosphere . Sulfur oxide – volcanoes and various industrial processes cause higher levels of SOx in the air . ( 산화 유황 sulfur oxide ) Petroleum and coal often contain sulfur compounds , and burning them produces sulfur oxide . Nitrogen oxides – these are forced out during high temperature burning , and electric discharge during thunderstorms also creates them . ( 산화질소 , 질소 산화물 nitrogen oxides ) It ’ s one of the most prominent air pollutants and is a reddish - brown colour , with a strong smell . Carbon monoxide – Vehicle exhaust is the main source of carbon monoxide , with fuels such as natural gas , coal and wood not being completely burned as another cause . ( 일산 화 탄소 carbon monoxide ) Particulates – also known as particulate matter ( PM ) , atmospheric particulate matter or fine particles . ( 미세먼지 , 미립자 particulates ) A coal - fired power station ( Picture : Getty ) They are tiny liquid or solid particles suspended in a gas and can either come from natural sources , such as volcanoes and forest fires , or from human activity , such as power plants and burning fossil fuels in vehicles . When did problems with polluted air begin ? Major problems with polluted air began in early December 1952 , when a cold fog descended on London – now referred to as the Great Smog of London . People began burning more coal than usual in response , with the air pollution that then formed becoming trapped by an inversion layer – a layer of the Earth ’ s atmosphere where the temperature increases with height . This had been caused by the thick mass of cold air in the fog , which brought about a virtual shut - down of the capital . A tugboat on the Thames near Tower Bridge in heavy smog , 1952 ( Picture : Getty ) During the four days of fog , at least 4 , 000 people died due to the weather itself , which was made worse by low - quality , high - sulphur coal being burned . Higher quality coal was being exported , due to the country ’ s unstable economy after the war . Parliament passed the Clean Air Act in 1956 in response to the fog , which was in effect until 1964 . This act implemented many measures to reduce air pollution , such as ‘ smoke control areas ’ in some parts of the country , where only smokeless fuels were allowed to be burned . Power stations were moved away from cities , and the height of chimneys was increased . It was an important landmark as far as developing a legal framework to protect the environment was concerned . In April 2014 , there were also high levels of air pollution in London and parts of south east England , where experts warned those with asthma and heart conditions to stay inside . On 29 April 2015 , the Supreme Court ruled that the government needed to take immediate action to decrease levels of air pollution . Read more : http : / / metro . co . uk / 2017 / 01 / 24 / what - are - the - main - causes - of - air - pollution - 6403379 / # ixzz 4 celnVKY 9