Toxic chemicals

Pesticides & Herbicides
DDT (Dichlorodiphenyltrichloroethane)
Paraquat
Endosulfan
Aldicarb
Chlorpyrifos

Industrial Chemicals
Asbestos
Formaldehyde
Phosgene
Hydrogen Cyanide
Carbon Tetrachloride

Heavy Metals (Toxic Elements)
Mercury (Hg)
Lead (Pb)
Cadmium (Cd)
Arsenic (As)
Chromium VI (Hexavalent Chromium)

Solvents & Organic Compounds
Benzene
Toluene
Chloroform
Vinyl Chloride
Trichloroethylene (TCE)

Gases
Ammonia (in high concentration)
Sulfur Dioxide (SO₂)
Nitrogen Dioxide (NO₂)
Carbon Monoxide (CO)
Ozone (O₃) – toxic at ground level