Question

The statements that are TRUE:

(A) methane leads to both global warming and photochemical smog

(B) methane is generated from paddy fields

(C) methane is a stronger global warming gas than CO${}_2$

(D) methane is a part of reducing smog.

Choose the most appropriate answer from the options given below:

• A. (B), (C), (D) only
• B. (A), (B), (C) only
• C. (A), (B), (D) only
• D. (A) and (B) only

Answer 1

The correct option is B (A), (B), (C) only

Answer: (b)

Contribution of global warming gas:

$C{O}_2>C{H}_4>CFC>O_3>N_{2}O>H_{2}O$

But $C{H}_4$ is 40 times stronger greenhouse gases than $C{O}_2$. It has more heating effects.

Methane is generated in large amounts from paddy fields.

Photochemical smog is a smog caused when UV light from the sun reacts with nitrogen oxides and hydrocarbons in the atmosphere. Hence, methane can leads to photochemical smog.

Reducing smog is mixture of smoke, fog and sulphur dioxide.
Hence, methane is not a part of reducing smog.