Nature and environment

12345678
Across
  1. 2. It's a shame to ______ all that precious water.
  2. 4. When you repair something you do this.
  3. 7. The synonym of barrier or burden.
  4. 8. The synonym of renewable.
Down
  1. 1. It's high time we reduced greenhouse gas ______.
  2. 3. Something huge or very big.
  3. 5. In order to protect endangered species from ______ we must provide them a safe environment to live in.
  4. 6. A waste disposal unit.