Dark Sky 2

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Across
  1. 2. The beautiful objects we can not see in a light-polluted sky.
  2. 5. Everything around us. The air, the water, the animals, and the plants.
  3. 7. Power that we use, but light pollution wastes it.
  4. 8. To harm or hurt.
  5. 9. The problem of too much light at night.
  6. 10. To keep something safe.
Down
  1. 1. When you turn on a light that you don't need.
  2. 3. Made by humans.
  3. 4. All the animals and plants living in nature.
  4. 6. to use less of something, or to make something smaller.