Across
- 4. cutting down forests and using land for other purposes
- 5. conversion of the land into deserts over a period of time
- 7. animals found in a region
- 9. variety of organisms in a region
Down
- 1. plants found in a region
- 2. renewing the forests by planting saplings
- 3. made up of all plants, animals, microorganisms in an area
- 6. species at the verge of extinction
- 8. group of organisms that are similar to each other and can reproduce within a group