Environmental

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