Multiple choice general knowledge

Name the gas released from landfills, decaying organic matter under shallow water in marshes and bogs, flooded paddy fields, by ruminant animals & termites, and by the burning of biomass. A molecule of this gas has 21 times more global warming potential than a molecule of CO2.

  1. Sulphur dioxide

  2. Methane

  3. Ammonia

  4. Nitrous Oxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Methane (CH4) is produced in anaerobic conditions by methanogens - in landfills, wetlands (marshes/bogs), rice paddies, and by ruminant animals through enteric fermentation. While its GWP is now estimated at 28-36 over 100 years, earlier IPCC reports used 21, making it the correct answer given the question's context.

Keep practicing — related questions