Question

1. which of the following processes add methane (ch4) to the atmosphere?

breakdown of plant and animal remains in the soil.
leakage from natural gas pipelines.
food digestion by land animals.
all of the above.

Explanation:

• Methane is produced during the breakdown of plant and animal remains in the soil (anaerobic decomposition).
• Leakage from natural gas pipelines releases methane (as natural gas is mainly methane).
• Food digestion by land animals (enteric fermentation in ruminants like cows) also produces methane.

Answer:

All of the above.