Across
- 1. technique used by farmers to cut down all plants and strip trees of bark
- 2. makeshifts communities at the edges of cities.
- 4. harmful substances introduced into an environment
- 5. the act or instance of migrating
- 7. frontier between political or geographic regions
- 8. clearing or destruction of forests
- 11. planting of young trees or the seeds on the land that has been stripped
Down
- 1. Technological and economic growth that does not deplete the human and natural resources of a given area
- 3. joint operation or action
- 6. an increase in size, number, significance, etc.
- 9. the external surroundings in which plants or animals live
- 10. seismic waves which can be destructive