Across
- 1. Troposphere is right below this layer.
- 5. It is warming the earth's surface
- 6. a thick dirty cloud at ground level caused by pollutants reacting to sunlight.
- 7. a mass of snow, ice, and rocks falling rapidly down a mountainside.
- 8. undesirable elements that spoils, infects, makes unfit the material, physical body or the environment.
- 11. The chemical addition of oxygen to break down pollutants or organic waste
- 12. Requires air or oxygen to function.
Down
- 2. People who are concerned about protecting the environment.
- 3. the act of preserving and protecting from loss, destruction, or waste.
- 4. Tiny and fine solid particles or liquid droplets suspended in air or gas
- 9. one who illegally hunts on another's property.
- 10. A location on land where wastes are placed for permanent disposal.