Across
- 1. the build-up of toxins in a foodchain
- 4. rocks formed from heat and pressure
- 7. the main way to disinfect water (treatment)
- 8. contaminates drinking water and leads to diseases
- 9. the rock and soil overlying a mine
- 10. the element with the symbol P
- 12. a ship design to prevent oil spills (p44)
- 16. when living things are used to remove toxic chemicals from a mine
- 20. international treaty to prevent marine pollution
- 21. the farming of livestock only
- 23. boiling a solution to purify it (water)
- 24. the element with the symbol K
- 25. the breaking down of organic waste using bacteria (2)
- 27. farming in a building to control many factors
- 28. the technique of growing other crops between rows of a main crop to maximise nutrients
- 29. rocks formed from layers of sediment
Down
- 2. the farming of crops only
- 3. energy derived from uranium
- 5. rocks formed from cooling magma
- 6. an item or resource that will not be used up/ can be replaced
- 11. energy from hot rocks under the earth's surface
- 13. algae overgrowth in lakes neighbouring farms
- 14. a mosquito is an example of this
- 15. another word for burning waste
- 17. energy from the sun
- 18. a waterborne disease
- 19. process to obtain natural gas or oil from cracking open shale rock
- 22. a type of organic fertiliser
- 26. energy derived from burning wood
- 30. water stored underground in porous rocks