Across
- 5. Particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.
- 7. Indicates an environmental change, such as lichen.
- 9. Mercury presence in predatory fish.
- 10. Chemicals, especially from car exhaust, make this by darkening fog.
Down
- 1. Is formed when two air pollutants combine, an example being NO2.
- 2. Chemicals that have carbon that are resistant to environmental degradation.
- 3. A pollutant that gets absorbed by the soil, commonly found in natural foods.
- 4. Visible air pollution in an urban city.
- 6. Chemicals that must have carbon present.
- 8. Watching waste go into a body of water from a pipe that leads to a factory.