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Answer 1

The green plants and trees present in the forest utilize carbon dioxide from the environment during the process of photosynthesis and release oxygen in the atmosphere. This oxygen is inhaled by the animals during respiration. Animals release carbon-dioxide during respiration which is absorbed by plants. In this way the oxygen and carbon dioxide cycle goes on. Since forests contain a large number of plants and trees, they help in maintaining the balance between oxygen and carbon dioxide in the atmosphere.

Answer 2

Answer:

Biosphere reserves are the protected areas meant for the conservation of plants and animals. ... There are 18 Biosphere Reserves in India established by the government that protect large areas of natural habitats. These areas are provided with the buffer zones that are open for some economic uses.

Name of Biosphere Reserves: States

Nilgiri Biosphere Reserve (2000): Tamil Nadu, Kerala, Karnataka

Pachmarhi Biosphere Reserve (2009): Madhya Pradesh

Sundarbans Biosphere Reserve (2001): West Bengal

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