Question:medium

Which waste management option is most effective for reducing greenhouse gas emissions from organic solid waste?

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For organic solid waste: \[ \boxed{ \text{Anaerobic Digestion} + \text{Biogas Recovery} } \] is one of the most effective methods for reducing greenhouse gas emissions while generating renewable energy.
Updated On: Jul 23, 2026
  • Open dumping
  • Sanitary landfilling without gas recovery
  • Composting
  • Anaerobic digestion with biogas recovery
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The Correct Option is D

Solution and Explanation

Step 1: Compare the fate of organic waste under each option.
Open dumping and landfilling without gas recovery both let organic waste decompose anaerobically underground, and the methane produced simply escapes into the air.
Step 2: See what composting achieves.
Composting is aerobic and mainly produces carbon dioxide and stabilized organic matter, avoiding a lot of methane, but it does not capture any gas for use as energy.
Step 3: Look at anaerobic digestion with biogas recovery.
Here the organic waste is digested in a sealed system, and the biogas released, mostly methane, is captured and used as fuel instead of escaping to the atmosphere.
Step 4: Weigh the greenhouse gas impact.
By capturing and using the methane rather than releasing it, this option prevents the most potent greenhouse gas from reaching the atmosphere, making it the most effective choice.
\[ \boxed{\text{Anaerobic digestion with biogas recovery}} \]
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