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 Carbon dioxide ${\mathrm{CO}}_2$

(D) Methane is a part of reducing smog.

• 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

The explanation for the correct option:

B: (A), (B), (C) only

• The steady rise in earth's temperature known as "global warming" is often brought on by the greenhouse effect, which is brought on by elevated amounts of Carbon dioxide, $\mathrm{CFCs}$, and other pollutants
• Gases that contribute to global warming
• ${\mathrm{CO}}_2>{\mathrm{CH}}_4>\mathrm{CFC}>{\mathrm{O}}_3>{\mathrm{N}}_2\mathrm{O}>{\mathrm{H}}_2\mathrm{O}$
• The methane produced by the paddy fields makes for around $20\%$ of the overall amount.
• Methane efflux rate in India is negative at $49\mathrm{mg}{\mathrm{m}}^{-2}{\mathrm{hr}}^{-1}$.
• One of the major global sources of methane emission is livestock, namely ruminants.
• However, ${\mathrm{CH}}_4$ is a $40-\mathrm{fold}$ stronger greenhouse gas than ${\mathrm{CO}}_2$.
• It has a greater amount of thermal effects.

Final Answer: Therefore, option (B) is the correct option, i.e. the statement given in A, B, and C are true.