| Hint | Chemical | Type |
|---|
| Car exhaust, cigarettes, colorless & odorless | |
| Coal & petroleum combustion, volcanoes, causes acid rain | |
| Sharp, biting odor, fuel combustion, acid rain | |
| Greenhouse gas, oceanic warming, respiration | |
| Aerosol, old refridgerators, ozone depletion | |
| Highway runoff, bullets, water poisoning from old pipes | |
| Radiation, military accidents | |
| Liquid, old thermometers, seafood | |
| Humans primarily exposed through smoking tobacco | |
| 'The Poisoner's Poison', industrial emissions | |
| | Hint | Chemical | Type |
|---|
| Ground water/drinking water pollutant, cigarettes | |
| Once widely used to fight mosquitoes | |
| Heavily used by U.S. during the Vietnam War | |
| Disrupts sex development in frogs, cause of major controversy | |
| Moth balls, field fumigation, hemolytic anemia | |
| Building insulation and fireproofing, causes lung damage when inhaled | |
| In some plastic bottles, has some estrogenicity & possible carcinogenicity | |
| Used in cars, dangerous to animals due to its sweet taste | |
| Stuns fish, could be a secret agent's suicide pill | |
| Responsible for the addictiveness of tobacco | |
|
Periodic Table 
The Nine Planets 
Digits of Pi
