Environmental Protection

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Across
  1. 1. The act of preserving the environment.
  2. 2. Food wastes, trash, rubbish.
  3. 4. The collection and often reprocessing of discarded materials for reuse.
  4. 5. A species at risk of extinction because of human activity, changes in climate.
  5. 7. Rain that contains a high concentration of pollutants.
  6. 9. The cutting down and removal of all or most of the trees in a forested area.
Down
  1. 1. A chemical added to the food to avoid its going off.
  2. 3. Gases which are responsible for the greenhouse effect, including carbon dioxide, methane, ozone, and the fluorocarbons.
  3. 6. An increase in the average temperature of the earth's atmosphere causing climatic change.
  4. 8. The introduction of harmful substances or products into the environment.