What is Smog?

Smog is a combination of two words— smoke and fog. It is a type of air pollution that is caused due to combustion of coal and emissions from vehicles and industries. It creates a misty layer in the air which reduces visibility and is hazardous to health.

What Causes Smog?

Smog is made up of oxides of sulfur, nitrogen, volatile hydrocarbons, particulate matter, and tropospheric ozone. Smog is formed when the suspended particles and various oxides react with sunlight in the atmosphere.

Smog can be classified into sulfurous smog and photochemical smog. Sulfurous smog is a result of a high concentration of various oxides of sulfur in the air and is caused due to combustion of fossil fuels, particularly coal. Photochemical smog is formed when various oxides of nitrogen and sulfur react in the presence of sunlight to form ozone gas.

What are the Effects of Smog?

Smog can lead to many health hazards like breathlessness, nose and throat infection, low birth weight in infants, lung infections, cancer, and sometimes even death.

What is a Smog Check?

A smog check is performed to determine the level of pollution caused by a vehicle in the form of greenhouse gases (GHG) and emissions from fossil fuels. Smog inspections are required when you purchase a new car or renew registration with some exceptions; if your vehicle is a 1975 model or older, it needs a smog check.

How to Get a Smog Test Done?

You can find a DMV-authorized smog check station near you to get a smog test for your vehicle. Several franchise dealerships and individually-owned repair shops are certified to perform smog checks.

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