What is Red Data Book?

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Cutting of trees resulting in the destruction of forest.

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Replanting of trees to raise forest. (Reforestation/ Deforestation/ Afforestation)

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Varieties of life forms present on the earth.

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Variety of plants growing in their natural habitat.

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Variety of animals found living in their natural habitat at a place.

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The species which is at the verge of extinction.

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The species which once existed upon the earth but is no more found today.