Asbestos, recognized by WTO as a kind of carcinogen, will poison human being and pollute the economy. No matter amphibole Asbestos or chrysotile is all harmful as concluded by relative authority. At pressent, some developed and European countries as well as some developing countries have already banned or restricted for using Asbestos products. Related information shows that Asbestos has been probably listed in the Convention on International Prior Informed Consent Procedure for Certain Trade Hazardous Chemicals and Pesticides in International Trade Rotterdam drafted by the United Nations Environment Program and Food, Agriculture Program, in the last vote of Rotterdam Convention; that means, Rotterdam Convention has possibly put an international limitation on using Asbestos products.

Asbestos, a mineral fiber silicate, widely applied in fire prevention board.It has good towing tolerance, heat insulation and is fire proof, so is widely used in antiseptic and heat insulated places. Asbestos has many varieties, among which chrysotile is the most abundant and widely used Asbestos itself doesn' t content any hazardous material. The most harmful substance comes from its fiber, which is very tiny and can hardly be seen. When this fiber comes into human's body, it will stick to and deposit at air tube and cause air tube disease, such as Asbestos lung mesothelioma between peritoneum and pleura. These disease normally has a long incubation period (lung cancer 15 to 20 years, mesothelioma 20 to 40 years), and can cause cancer when severe. So Asbestos has been recognized as a carcinogen by Centro International de Investigationes sobre et Cancer.