Environmental free radicals.
D000397:Air Pollution; D002273:Carcinogens / Q000737:chemistry*; D004777:Environment; D005609:Free Radicals; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology*; D012907:Smoking / Q000633:toxicity*
D002273:Carcinogens; D005609:Free Radicals
AIR POLLUTION; CARCINOGENS/chemistry; LUNG NEOPLASMS/etiology; SMOKING/toxicology