The World Health Organization estimates asbestos kills at least 90,000 people a year. Dozens of countries have banned the use of the material including the European Union, Australia and recently the United States. Up to a million asbestos fibers can fit on the head of a pin and no expert has been able to prove any safe level of exposure. Western governments still sell it to developing countries who lack the knowledge to understand what they are allowing into their homes and workplaces.