Natural Resources

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Across
  1. 2. Covers 75% of the Earth's surface
  2. 3. Dissolved in sea water to make shells of marine animals
  3. 5. A mixture of many gases
  4. 6. The major component of the atmosphere on planets where no life is found.
Down
  1. 1. Convert carbon dioxide into glucose
  2. 2. formed due to heating of water bodies and activities of living organisms
  3. 4. Affects the quality of life and harm the biodiversity