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प्रश्न
Differentiate between biodegradable and non-biodegradable substances. Cite examples.
उत्तर
Biodegradable substances are those substances that can be broken down by biological processes, e.g., paper, wood, vegetable peels. etc.
Non-biodegradable substances are those substances that cannot be broken down by biological processes, e.g., plastic, DDT, bakelite, etc.
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