Smog is air pollution that reduces visibility. The term “smog” was first used in the early 1900s to describe a mix of smoke and fog. The smoke usually came from burning coal. Smog was common in industrial areas, and remains a familiar sight in cities today.
What type of air pollution is smog?
The term “smog” was first used around 1950 to describe the combination of smoke and fog in London. Today, it refers to a mixture of pollutants made up mostly of ground level ozone.
Is smog primary or secondary pollution?
Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2). Different types of secondary pollutants include: Ozone (O3)
What is the category of smog?
At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.
Why is smog a pollutant?
Smog forms when pollutants are released into the air. The pollutants are formed both naturally and by humans, however, the human-induced pollutants are of most concern due to the magnitude of pollutants produced by the burning and extraction of fossil fuels, which are known to cause extreme health effects.
What is smog an example of?
Smog is an example of air pollution that is visible to the naked eye.
What type of pollution is smog quizlet?
Smog: This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, 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.
Is smog a primary air pollutants?
Smog is an example of how primary air pollution from human activity can lead to even more harmful secondary pollution. This panel shows how a secondary pollutant is formed. Primary pollutants (nitric oxide and VOCs) from vehicle emissions react with sunlight to create a new pollutant (ozone) in the atmosphere.
Which is an example of secondary pollution?
Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.
What are 2 examples of primary pollution?
Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.
What are the categories of pollutants?
These six pollutants are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides.
What are the 5 classes of pollutants?
Air Pollution, Noise Pollution, Water Pollution, and Soil Pollution. Other types of pollution are thermal pollution, light pollution, and radioactive pollution.
What meaning is smog?
Definition of smog
: a fog made heavier and darker by smoke and chemical fumes also : a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust.
Is air pollution and smog the same thing?
Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it’s also called smog.
What is smog and its effects?
Smog is composed of a mixture of air pollutants that can endanger human health. Various human health problems such as emphysema, asthma, chronic bronchitis, lung infections, and cancers are caused or exacerbated by the effects of smog.
What is an example of pollution?
Cars spew pollutants from their exhaust pipes. Burning coal to create electricity pollutes the air. Industries and homes generate garbage and sewage that can pollute the land and water. Pesticides—chemical poisons used to kill weeds and insects—seep into waterways and harm wildlife.
Where does smog usually form?
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.
Which of the following is a type of environmental pollution?
Examples are: dumping industrial waste, sewage disposal, dumping wastes, mining, oil spills, etc. These pollutants affect the Eco-system underwater by spoiling the life of numerous plants & animal species.
What is smog question answer?
Smog is a photochemical haze caused by the action of solar ultra violet radiation on atmosphere polluted with primary pollutants such as hydrocarbons and oxides of nitrogen from automobile exhaust. It reduces visibility and is highly suffocating and toxic to humans, animals and plants.
What causes smog quizlet?
What causes smog? Smog is mostly caused by action of sunlight on a mixture of hydrocarbons & oxides of Nitrogen.
What is the secondary air pollution?
Secondary air pollution is pollution caused by reactions in air already polluted by primary emissions (from factories, automobiles and so forth). An example of secondary air pollution is photochemical smog.