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Q. 1. Why are some substances biodegradable and some non-biodegradable?
Answers (1)
Substances that can be broken down by biological processes are said to be biodegradable. In our environment, many of the substances are broken easily by decomposers. Examples: Paper, vegetable peels etc.
However, substances which cannot be broken down biologically but by physical means are known as non-biodegradable substances. Example: Plastic.
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