Discussion
Which of the following is a source of methane ?
Answer: A
Wetlands are a major natural source of methane, since anaerobic decomposition of organic matter in waterlogged soils releases it. Other major sources are rice fields, livestock and landfills. The foam industry is associated with CFCs and other chemicals, thermal power plants chiefly with carbon dioxide, sulphur and nitrogen oxides, and cement industry with carbon dioxide and dust. The answer is wetlands. Rice fields, livestock and landfills are the other large sources, while fossil fuel use also adds a share.
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