smog


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Related to smog: photochemical smog, acid rain

smog

(smog),
Air pollution characterized by a hazy and often highly irritating atmosphere resulting from a mixture of fog with smoke and other air pollutants.
[smoke + fog]
Farlex Partner Medical Dictionary © Farlex 2012

smog

Photochemical smog Environment An acronym of smoke and fog caused by combustion of often synthetic materials with production of noxious volatile byproducts; smog mortality ↑ substantially when smoke and SO2 levels exceed 750 µg/m3 Clinical Dyspnea, acute exacerbation of COPD; smog triggers asthmatiform Sx–wheezing and markedly ↑ respiratory effort or, if intense, marked cyanosis–PaO2 < 50 mm Hg; PaCO2 50-100 mm Hg, CHF, cor pulmonale. See Air pollution, Bhopal, Clean Air Act, Particular air pollution, Pollution, Yokohama asthma.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

smog

(smog)
A hazy and often highly irritating atmosphere resulting from a mixture of fog with smoke and other air pollutants.
[smoke + fog]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Mercado said the smog and the haze could dissipate during rainfall because the smog comprises small particles that could be dissolved by rains.
Assessment and mapping of aerosol point sources indicate that 65 per cent of aerosol sources were detected within Pakistan which means most of the sources are located within Pakistan and sources of smog need to be managed and controlled within the country first,
When paired with deforestation and the consequent decrease in rainfall, these photochemical particles persist in the air.5 Recently incidents of smog have occurred due to the burning of crops.
Earlier, Senator Sherry Rehman on a calling attention notice said that the smog has been contributing negatively on the health of country people.
The director urged the people to adopt precautionary measures during the smog by covering their nose and mouth and wear glasses and helmet while travelling especially on motorcycle for safety from eye infection, itchy skin, headache and other chest diseases.
Smog has become a common feature of the winter season in parts of the country, particularly Punjab.
To reduce the risk of smog, the Punjab government has initiated a project to modernise brick-kilns in the province.
'Smog is a particular problem from late October through mid-January in Pakistan and we are unable to end smog at all but we are trying to reduce it through steps at all levels,' he said.
Smog commission chairperson Dr Parvez Hassan also appeared before the court, along with petitioners and officials of Punjab's environment department.
The increasing urbanisation has resulted in a sharp decline in trees and that is the true cause of smog. A study under the Land Cover Project led by Geomatics of Universite Catholique de Louvain (UCL) Belgium showed how quickly we are moving towards a treeless world.
Islamabad: Threatened by smog, Pakistan is looking towards its all-weather friend, China, for electricity generation without interruption in smog-hit areas.
The word smog was first used in London during early 1950.1 Chemical reaction of sunlight typically known as photochemical smog is produced in the environment by nitrogen oxide and natural volatile compounds.