Environmental Science - Study Mode

[#726] Which of the following is a secondary pollutant
Correct Answer

(C) O 3

Explanation

Solution: Secondary pollutants are not emitted directly. They are formed from the combination of primary pollutants with some other compound. Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.

[#727] The supersonic jets cause pollution by the thinning of
Correct Answer

(C) O 3 layer

Explanation

Solution: Most commercial flights are confined to the troposphere, but high-level supersonic aircraft inject pollutants into the stratosphere, which leads to the thinning of the ozone layer. Of these nitrogen oxides are especially harmful.

[#728] Scientists are able to determine the air temperature in the thermosphere by:
Correct Answer

(C) Observing changes in satellite orbits

Explanation

Solution: Scientists are able to determine the air temperature in the thermosphere by observing changes in satellite orbits.

[#729] What is "Black Lung"?
Correct Answer

(A) Occupational Hazard to the miners

Explanation

Solution: Occupational hazard to the miners is called black lung.

[#730] A permeable rock that contains hydrocarbon fluids and gases is called a/an
Correct Answer

(C) Oil reservoir

Explanation

Solution: A permeable rock that contains hydrocarbon fluids and gases is called a/an oil reservoir.