निम्नलिखित में से कौन कचरा प्रबन्धन के 4R का हिस्सा है? Which of the following is a part of 4R of Waste Management?

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निम्नलिखित में से कौन कचरा प्रबन्धन के 4R का हिस्सा है? Which of the following is a part of 4R of Waste Management?