Across
- 4. Formed in the air through reactions; sunlight turning car emissions into ground-level ozone.
- 6. Toxins concentrating in predators; mercury, carry more disease in fish up the food chain
- 9. source: Pollution from multiple diffuse origins; water from rain carrying pollutants from different streets.
- 10. Emitted from combustion; car engines producing nitrogen oxides, contributing to urban air pollution.
Down
- 1. air pollution that reduces visibility; vehicle emissions and industrial pollutants.
- 2. : Evaporating chemicals; paints emitting fumes, contributing to indoor air pollution.
- 3. Directly emitted harmful substances; cars releasing carbon monoxide.
- 5. source: Pollution from a specific spot, like a factory chimney releasing smoke.
- 7. : Protective in the stratosphere; harmful at ground level, affecting respiratory health.
- 8. species: Species revealing ecosystem health, frogs and toads, which may indicate pollution.