Identifying Agricultural Pollutants

Steps:

• List key agricultural pollutants: pesticides like insecticides and greenhouse gases like methane from livestock and rice.
• Evaluate insecticides: released directly during pest control, polluting soil and water.
• Evaluate methane: emitted from animal digestion and manure management.
• Evaluate fertiliser and sulphur dioxide: fertiliser causes runoff pollution but isn't a direct emission; SO2 comes from industrial combustion, not farming.

Why A is correct:

• Insecticides and methane align with EPA definitions of agricultural emissions, while fertiliser and SO2 do not qualify as direct farm-released pollutants.

Why the others are wrong:

• B incorrectly includes sulphur dioxide, an industrial pollutant.
• C wrongly excludes insecticides and methane, core agricultural sources.
• D wrongly excludes insecticides and includes sulphur dioxide.

Final answer: A