Choose the option which is the main source of methane emissions contributing to the greenhouse effect? 

The correct answer is Agriculture.

Key Points

• Agriculture is a major source of methane emissions, particularly from livestock digestion (enteric fermentation) and manure management.
• Ruminant animals such as cows produce significant amounts of methane during digestion, which is released into the atmosphere.
• Rice paddies also contribute to methane emissions due to anaerobic conditions in flooded fields that facilitate methane-producing microbes.
• Methane is a potent greenhouse gas, with a much higher warming potential compared to carbon dioxide over a short period.
• Mitigating methane emissions from agriculture is crucial for addressing climate change and reducing the greenhouse effect.

Additional Information

• Industrial processes and automobile emissions primarily contribute to carbon dioxide and other greenhouse gases, but not as significantly to methane.
• Burning fossil fuels releases carbon dioxide and other gases, which are significant for the greenhouse effect but not the main source of methane.
• Efforts to reduce methane emissions from agriculture include improving livestock feed, manure management practices, and rice cultivation techniques.