Across
- 2. ozone, acid rain, NO2
- 5. accumulation of insecticide in Zooplankton
- 7. insecticide used in agriculture
- 8. a man spotted littering out his car window
- 9. carbon monoxide, nitrogen oxide, sulfur oxide
Down
- 1. spotting littered garbage on the street sidewalk
- 2. mix of fog and smoke
- 3. benzene, ethylene, glycol
- 4. industrial chemicals, pcb
- 6. certain plants, fungi, algae, etc.