Ecosystems

3. the parts of the environment that involve living things, such as disease or hunting
5. the river that forms the border of NSW and VIC
6. an animal responsible for the destruction of large areas of land
9. farming practices that give employment and income
11. the salting of land caused by overclearing of land and using too many fertilisers
12. a small structure that blocks a river
13. the home of an animal or plant
15. an animal or plant that was brought from another country
18. the breakdown and wearing away of soil
19. a type of organism that lives in or near water, and can cause toxic outbreaks in waterways
20. a plan for action
21. an area of land that drains all the water that flows in it to a central point
22. an element that is needed by all living things to make protein

1. the flow of water through the environment
2. all living and no-lining parts of the environment
4. the parts of the environment that involve non-lining things eg temperature
7. a substance that causes harm to nature
8. the flow of carbon through the environment
10. an Australian marsupial that is threatened with extinction
14. a chemical addred to the soil to improve plant growth
16. describes an animal or plant population whose numbes have fallen dangerously low
17. protecting and and preserving the numbers of a species, including its habitat