The New York Times
June 10, 2011
WASHINGTON — The government issued warnings on Friday about two materials used daily by millions of Americans, saying that one causes cancer and the other might.
Government scientists listed formaldehyde as a carcinogen, and said it is found in worrisome quantities in plywood, particle board, mortuaries and hair salons. They also said that styrene, which is used in boats, bathtubs and in disposable foam plastic cups and plates, may cause cancer but is generally found in such low levels in consumer products that risks are low.