title: Mass extinction linked to lung cancer mystery.
abstract: The volcanism that nearly annihilated life on Earth 250 million years ago also boosted the silica content of coal that is driving high lung cancer rates in a Chinese county.
authors.forename: Janet
authors.initials: J
authors.lastname: Pelley
mesh_terms: D016902:Air Pollution, Indoor; D002273:Carcinogens / Q000633:toxicity*; D002681:China / Q000453:epidemiology; D003031:Coal / Q000032:analysis*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced / Q000401:mortality*; D008297:Male; D012822:Silicon Dioxide / Q000633:toxicity*; D014835:Volatilization
chemical_list: D002273:Carcinogens; D003031:Coal; D012822:Silicon Dioxide