In respect of import, the United States has mainly imported chrysotile from Canada to be mostly used in the US Army for manufacturing of fire-proof aircrafts, airplanes and weapons. It had been also used in construction of the trade towers before 1980. In addition, the roofing products also account for about 72% of the consumed chrysotile asbestos.
In respect of exploitation, chrysotile exploitation has been prohibited since 2002 but the import activities and use of the chrysotile-containing products have continued. According to the U.S. Geological Survey, the United States imported and consumed about 820 metric tons of chrysotile asbestos in the first 7 months of 2010 and this figure was further increased in the following years.