The correct answer is D. Wetlands.
Wetlands are a type of ecosystem that is saturated with water, either permanently or seasonally. They are found in a variety of locations, including coastal areas, riverbanks, and bogs. Wetlands are important for a number of reasons, including their ability to filter water, provide habitat for wildlife, and store carbon.
Methane is a greenhouse gas that is released from wetlands as a result of the decomposition of organic matter. Methane is a more potent greenhouse gas than carbon dioxide, and its release into the atmosphere contributes to climate change.
The other options are incorrect because they are not sources of methane emission into the atmosphere.
- Automobile exhaust fume is a source of carbon monoxide and other pollutants, but not methane.
- Industrial chimneys emit a variety of pollutants, including sulfur dioxide, nitrogen oxides, and particulate matter, but not methane.
- Mining can release methane into the atmosphere, but this is typically a localized issue.
In conclusion, the correct answer is D. Wetlands.