Across
- 2. 50-75% of pollution in Canada is from this country
- 4. Most overmining in Canada happens here
- 5. Sulfer dioxide released from mining tools _____ air quality
- 7. ________ is slowed down due to acid rain and other environmental issues
- 8. Occurs mainly near the Great Lakes and St. Lawrance River
- 9. Acid rain is caused by _____
- 10. Increased events of ________ happen due to acid rain
- 11. In 1972
Down
- 1. ______ of natural habitats is caused by clear-cutting
- 3. The act of cutting down too many trees at once
- 6. the process used to extract minerals often result in environmental _____