Across
- 7. a type of waste that can not be decomposed by other living organisms.
- 9. .... gas required for photosynthesis
- 10. waste produced by plants or animals
Down
- 1. can cause noise pollution
- 2. also known as natural gas
- 3. Substance that causes pollution
- 4. Retention of extra heat by the earth
- 5. Addition of pesticide can cause
- 6. compressed natural gas
- 8. celebrates on first July