And the problem is it s a carcinogen.

A carcinogen is any substance or agent that causes abnormal growth of cells, which can also cause them to metastasize or spread.

The dry deposition was in the form of gaseous pollutants and soot particles containing heavy metals and polycyclic aromatic hydrocarbons, including benzoapyrene, which is a known carcinogen.

So when I went through the data, I had very surprising results, because I found that four out of the five marinating ingredients actually inhibited the carcinogen formation.

And because these materials are so prolific, because they're found in so many places, there's one other place you'll find this material, styrene, which is made from benzene, a known carcinogen.

While barbers, hairdressers, taxi drivers, bar owners, and doctors are often licensed, permits are rarely required to operate a tanning parlor. None of the other professions listed above, however, knowingly exposes its clients to a confirmed environmental carcinogen.

Similarly, Mengniu, China s largest dairy company, announced last December that it had destroyed hazardous products at a plant in the Sichuan province after government safety inspectors discovered the carcinogen aflatoxin in a batch of its milk. (The company denied that any contaminated milk had reached consumers.)