Across
- 2. forecast about the population.
- 4. places where animals live which arw decreasing in size.
- 6. balance of natural relationships in the environment.
- 7. perfectly cleaned/untouched/unspoiled areas.
- 8. warming of the earth's surface caused by pollution.
Down
- 1. limited resources.
- 3. changes in the weather or climate.
- 5. types of animals/plants which are in danger of no longer existing.