Explain the theory of 4R
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The 4 R principle is: 4R means Reduce, Reuse, Recycle and Restore. Reduce- We must reduce the use of resources as much as possible and save them for the future generation. Reducing the usage is a method of conservation of resources. Reuse- Resources can be reused wherever possible.
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Answer: The 4R means Reduce, Reuse, Recycle and Restore. (i) Reduce: We should reduce the use of non-biodegradable compounds that are harmful to us. ... (iv) Recovery: If the waste remains after it is been reused and recycled, we can use it to generate energy at our waste-energy plant. This is known as Recovery.
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