Across
- 1. Having the potential to cause cancer.
- 3. Essential for life, H2O.
- 7. Chemicals used to kill pests.
- 9. WARMING The long-term heating of Earth's climate system.
- 10. The act of preserving and protecting the environment.
- 13. Air in motion.
- 14. Large areas covered chiefly with trees and undergrowth.
- 18. Related to the sea.
- 19. RESOURCES Natural solid substances extracted from the Earth.
- 21. Compounds harmful to the ozone layer.
- 23. Substances added to soil to enhance its fertility.
- 24. Electricity generated by water power.
- 26. RAIN Rainfall made acidic by atmospheric pollution.
- 28. Planting trees to restore forested areas.
- 30. EFFECT The trapping of the sun's warmth in the Earth's lower atmosphere.
- 31. A large natural or artificial lake used as a source of water supply.
- 32. Laws and regulations.
- 33. A large quantity of something.
Down
- 2. The envelope of gases surrounding the Earth.
- 4. Pertaining to water.
- 5. The process by which soil and rock are removed from the Earth's surface.
- 6. Contamination of air, water, or soil.
- 8. Related to the sun.
- 11. Compounds that contain oxygen and one other element.
- 12. Related to the nucleus of an atom.
- 15. Related to the senses.
- 16. Capable of causing disease.
- 17. The clearing of trees, transforming a forest into cleared land.
- 20. Capable of being broken down by natural processes.
- 22. FUEL Natural fuels formed from the remains of living organisms.
- 25. The process by which moisture is carried through plants.
- 27. The capacity to do work.
- 29. The natural world around us.