Across
- 3. removal of layer of topsoil
- 4. international agreement
- 6. one of the 3 r's
- 8. change of climate
- 10. effect warming of atmosphere
Down
- 1. water in permable rock layers
- 2. forest land to non-forest use
- 5. too much grazing
- 7. dirty air
- 9. throwing garbage
- 11. ecosystem dominated with trees