Across
- 2. an environmental impact of air pollution
- 3. an air pollutant
- 5. movement of people from one place to another
- 7. a health impact of air pollution
Down
- 1. mixture of solid particles and liquid droplets in the air
- 4. one of the largest causes of air pollution
- 6. large cities with a population of over 10 million
- 8. a megacity