Question

Smog is a combination of:
A. Fire and water
B. Smoke and fog
C. Water and smoke
D. Air and water

Answer 1

Hint: Smog is a type of intense air pollution. Smog reduces visibility. Smog was common in industrial areas and remains a familiar sight in cities today. When inhaled, smog irritates our airways, increasing our risk of serious heart and lung diseases. Now, figure out its composition.

Complete answer:
Today, most of the smog we see is photochemical smog. Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound in the atmosphere. Nitrogen oxides come from car exhaust , coal power plants and factory emissions. When sunlight hits these chemicals, they form airborne particles and ground- level ozone or smog.
Ozone can be helpful or harmful. The ozone layer high up in the atmosphere protects us from the sun’s dangerous ultraviolet radiation. But when ozone is close to the ground, it is bad for human health. Ozone can damage lung tissue, and it is especially dangerous to people with respiratory illnesses like asthma. Ozone can also cause itchy, burning eyes.

Many countries, including the United States, have created laws to reduce smog. Some laws include restrictions on what chemicals a factory can release into the atmosphere, or when the factory can release them. Some communities have "burn days" when residents can burn waste such as leaves in their yard. These limits on chemicals released into the air reduce the amount of smog.

Therefore, smog is a combination of smoke and fog, which is option B.

Note: Overall, smog is harmful to both the respiratory cardiovascular system. It aggravates heart problems, asthma and other lung problems. For example, on a high ozone-alert day, your eyes and throat may burn, and you may cough and wheeze.