Although not all vermiculite contains asbestos, some products were made with vermiculite that contained asbestos until the early 1990s.
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Vermiculite mines throughout the world are now regularly tested for it and are supposed to sell products that contain no asbestos.
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这个就是胡说八道了,30年前Libby Mine in Montana 美国最大的蛭石矿是含石棉的,后来就给关闭了,现在市面上出售的蛭石都是无石棉的。
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