Question

Which important green-house gas, other than methane, is being produced from the agricultural fields?

• A. Arsine
• B. Sulphur dioxide
• C. Ammonia
• D. Nitrous oxide

Answer 1

The correct option is D Nitrous oxide

The various green house gases are carbon dioxide, methane, chlorofluorocarbons, nitrous oxide, water vapours and ozone. Nitrous oxide is produced by combustion of fossil fuels, livestock wastes, breakdown of nitrogenous fertilizers in soil, nitrate contaminated water, nylon production and other industrial processes. Rice fields are water logged and poorly aerated. In such conditions denitrifying bacteria break the nitrogenous fertilizers and add to atmospheric nitrous oxide.