Across
- 3. Harmful substances
- 5. The world around us
- 7. Treat waste to make it good for reuse
- 8. Which can't be exhausted
Down
- 1. Capable of maintaining its viability
- 2. energy Power derived from the sun
- 4. gases Carbon dioxide and others are...
- 6. storms Hurricanes and typhoons are …
- 8. What we throw away