Across
- 4. Damage caused to water, air, soil. By harmful substances or waste
- 7. a liquid mixture of hydrocarbonsc an be extracted and refined to produce fuels
- 9. A chemical substance used to kill harmful insects
- 10. a chemical combination of hydrogen and carbon, such as in oil or petrol
- 11. The upper layer of earth in which plants grow
- 13. industry of obtaining coal from a mine
Down
- 1. practice of farming
- 2. people
- 3. a microscopic organism
- 5. Waste material or unwanted things that you throw away
- 6. poisonous
- 8. All the living things in an area and the way they affect each other and the environment
- 9. A substance that pollutes
- 12. a living thing that typically has a stem, leaves, roots, and sometimes flowers