Question

Which natural pollutant is associated with forest fires and also occurs in marshy areas?

• A. CO₂
• B. NO₂
• C. CH₄
• D. SO₂

Answer 1

Answer:

C. CH₄

• Correct Answer: Option C (CH₄)

• Methane (CH₄) is a natural pollutant that is associated with both forest fires and marshy areas. During forest fires, methane is released through the incomplete combustion of organic matter. In marshy areas and wetlands, methane is produced through anaerobic decomposition of organic materials by methanogenic bacteria. These bacteria break down organic matter in oxygen-poor environments like swamps, bogs, and marshes, releasing methane as a byproduct. This natural process is known as methanogenesis. Methane is a potent greenhouse gas that contributes significantly to global warming, with a warming potential approximately 25 times greater than carbon dioxide over a 100-year period.

• CO₂ (Carbon dioxide): While produced in forest fires, it's not particularly associated with marshy areas

• NO₂ (Nitrogen dioxide): Primarily associated with combustion processes and urban pollution

• SO₂ (Sulfur dioxide): Mainly associated with volcanic activity and fossil fuel combustion