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Why are some substances biodegradable and some non-biodegradable?
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Why are some substances biodegradable and some non-biodegradable?

Answer

Based on the process of decomposition some substances are biodegradable and some are non-biodegradable. The substance being biodegradable is being organic that can be used up by scavengers of the environment. Non-biodegradable substances are not degraded or decomposed by bacteria and fungi, so they persist for a long time.
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