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.
这些材料的量太大了， 它们几乎无所不在， 还有一个地方你会发现这种材料，苯乙烯 它是由苯制成，一种已知的致癌物。