Human Impacts on Earth's Systems

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Across
  1. 3. practice of protecting the environment and using resources carefully
  2. 4. a natural fuel such as oil, natural gas, and coal made from fossils millions of years ago
  3. 8. material that is made by nature as quickly as people use it
  4. 9. making a new item with an old item or using again
  5. 10. energy that comes from wind
  6. 11. energy that comes from the sun
  7. 12. getting as much as we can from resources and not wasting
Down
  1. 1. something found in nature that humans use
  2. 2. not made fast enough to replace what is used
  3. 5. energy that comes from the movement of water
  4. 6. presence of a substance in the environment that are harmful to humans or other organisms
  5. 7. using less of a material or energy
  6. 9. the process of taking materials ready to be thrown away and converting (changing) them into reusable materials