Environmental Science - Study Mode

[#416] The pollutant that causes hole in the ozone layer is
Correct Answer

(C) CFC s

Explanation

Solution: Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).

[#417] Ozone depletion is mostly caused by
Correct Answer

(C) CFC s

Explanation

Solution: Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.

[#418] Which one of the following is the correct percentage of the two green house gases that contribute to the total global warming?
Correct Answer

(B) Methane-20%, N 2 O-18%

Explanation

Solution: Methane-20%, N 2 O-18% is the correct percentage of the two green house gases that contribute to the total global warming.

[#419] Pick out the potent green house gas
Correct Answer

(C) CH 4

Explanation

Solution: Methane (CH 4 ) is the potent green house gas.

[#420] Abbreviation for NGO is
Correct Answer

(D) non-governmental organization

Explanation

Solution: NGO is an abbreviation for non-governmental organization.