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Continue to ChatEarth Day 2020 Special: पृथ्वी दिवस क्यों मनाया जाता है? जानिए किस महान व्यक्ति ने इसे शुरू किया https://www.sabkuchgyan.com/earth-day-2020-special-why-is-earth-day-celebrated-know-which-great-person-started-it/