Natural Resources

123456789
Across
  1. 3. The main source of energy.
  2. 5. Heat that is generated within the Earth is _________ energy.
  3. 6. We get timber from _________.
  4. 8. To use materials again and again
  5. 9. To convert a used product into a new product instead of throwing it away
Down
  1. 1. Wind energy is produced by _________.
  2. 2. A very large percentage of the Earth is covered with _________.
  3. 4. To minimise the amount of waste we produce
  4. 7. A form of renewable energy powered by ocean tides is _________ energy.