What air pollutants does smog consist of? How are they caused? What adverse effects do they have on human beings and the environment?

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The previous posts are excellent. I would like you to take a look at the link posted below. It is a simulator that shows the effects that smog can have on the environment. It is also a great source to show what steps individuals can take to clean up smog....

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The previous posts are excellent. I would like you to take a look at the link posted below. It is a simulator that shows the effects that smog can have on the environment. It is also a great source to show what steps individuals can take to clean up smog. In addition, it shows the devastating effects that smog can have on our communities.

Smog was originally a term used to describe a combination of smoke and fog. Today, smog is defined as many different pollutants but is made up of mostly ground level ozone.

The 1990 Clean Air Act established an approach to reduce the harmful effects that these pollutants can have on the environment.

Smog has many adverse effects. It can cause respiratory illnesses, aggravate allergies, etc. Smog also contains carcinogens. In the environment is can be very harmful to animals and their habitats.

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Smog is a combination of the words smoke and fog and classically is a mixture of sulfu dioxide (from coal burning) and smoke.  Nowadays it comes mainly from vehicle emissions rather than heavy coal burning.  It can include the following:

  • nitrogen oxides, such as nitrogen dioxide
  • tropospheric ozone
  • volatile organic compounds (VOCs)
  • peroxyacyl nitrates (PAN)
  • aldehydes (RCHO)

There are a number of possible side effects to humans when smog is heavy, one of the reasons that certain cities have smog alerts and warn people to stay inside on certain days or urge citizens to drive as little as possible on days when smog is of particular concern.

Some of the most heavily affected cities in the world are London, Mexico City and Tehran and LA is likely the most seriously affected in the United States.  Smog has been the cause of a number of deaths, as it was a particularly serious problem when heating using coal was a common practice and it was a serious problem in some US cities during that time.

 

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