Environment

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Across
  1. 1. The process of making new products from used materials (9 letters)
  2. 4. The layer of gases surrounding the Earth (9 letters)
  3. 5. The practice of using resources in a way that does not deplete them (11 letters)
  4. 6. Harmful substances released into the air (9 letters)
  5. 7. The gradual increase in the Earth's temperature (8 letters)
Down
  1. 2. The act of protecting natural resources and the environment (11 letters)
  2. 3. The variety of plant and animal life in a particular habitat (11 letters)
  3. 5. A renewable energy source from the sun (5 letters)
  4. 6. The contamination of water bodies (9 letters)