Working for a cause

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Across
  1. 4. Chemicals used in farming to kill insects and protect crops
  2. 6. Natural resources like coal and oil that come from ancient plants and animals
  3. 7. A protest event to show disagreement with something
  4. 8. The natural world; it includes everything around us, like air, water, and land
  5. 10. The removal of trees from an area, often causing harm to the environment
  6. 12. To make air, water, or land dirty and unsafe
  7. 13. The variety of life in the world or in a particular area, including plants and animals
Down
  1. 1. Using practices that do not harm the environment and can continue for a long time
  2. 2. A person who offers their time to help without being paid
  3. 3. A natural home for a plant or animal
  4. 5. A relationship where two living things benefit each other
  5. 9. A type of mine where minerals are extracted from the earth's surface
  6. 11. A network of plants, animals, and other organisms that interact in a specific environment