Across
- 3. - area that contains significant level of living organisms and is threatened with destruction
- 5. - management of a natural resource to prevent exploitation, destruction or neglect
- 7. - native to a specific geographic space
- 8. - part of the Earth where life exists.
Down
- 1. - threatened with extinction
- 2. - introduction of harmful substances into the environment
- 4. - all the different kinds of living organisms within a given area.
- 6. - time between organism's birth and its reproduction