Across
- 3. The number of different species of plants and animals in an ecosystem.
- 9. Added to crops to give them more nutrients.
- 10. We may have to move to this planet after messing up Earth
- 11. A pollutant that spills from oil tankers.
- 13. When floods erode and remove topsoil.
- 14. Areas of land covered by shallow water for most of the year.
Down
- 1. A poison that kills insects like locusts
- 2. Green plants that produce their own food.
- 4. Micro-organisms that break down dead organic matter.
- 5. A soluble pollutant used in washing dishes.
- 6. A poison to kill weeds.
- 7. Killing micro-organisms by bubbling gas through water.
- 8. A reptile that lives in the sea.
- 12. Animals that eat plants or other animals.
- 15. We are polluting this with emissions from factories.