Across
- 4. The act of making a strong public expression of disagreement and disapproval
- 7. To use again instead of throwing away
- 8. Variety of species of living organisms of an ecosystem
- 9. The state of being no longer in existence
Down
- 1. The process of a liquid changing to a gas
- 2. A long period when there is little or no rain
- 3. Any materials unused and rejected as worthless or unwanted
- 5. The process of collecting and changing old paper, glass, plastic, etc. so that it can be used again
- 6. A substance added to soil to improve plants' growth and yield
- 10. An organic poison — it’s made by plants and animals