Across
- 2. effect when the gases are trapped in the atmosphere
- 4. a mass of snow falling from a mountainside
- 7. illegal hunting
- 8. a person who is concerned about protecting the nature
- 9. processing the waste and making something out of it
- 12. when the temperature of the earth rises
Down
- 1. a slight rain
- 3. when the sky is completely covered with clouds
- 5. a snowstorm
- 6. when animals die out
- 7. the introduction of harmful materials into the environment
- 10. illegal cutting of trees
- 11. a period with no rains