Asbestos is no longer used in the vast majority of construction projects in the United States due to environmental regulations. While efforts to entirely ban the substance proved unsuccessful decades ago, when a congressional ban was repealed, the use of asbestos was largely discontinued.
However, many old buildings across the Commonwealth of Massachusetts still contain large amounts of the toxic material as they were constructed and renovated prior to the ban in the 1970s. Asbestos was heavily used due to its cheap cost to mine and manufacture and its natural ability to resist fire, heat, electricity and caustic chemicals.
As these old and sometimes historic buildings crumble into a state of disrepair, the asbestos once contained in siding materials, roofing materials, insulation products, and flooring material is allowed to literally turn to dust. That dust is highly toxic, as, when the fibers are inhaled, they can become lodged in a layer of tissue known as the mesothelium. When asbestos is in a crumbling state where it can be crushed by the pressure of a human hand, it is known as friable asbestos. This is the most deadly form of asbestos other than pure asbestos powder. Asbestos powder did not have many industrial or commercial applications, but it was used in the past for rather unfortunate purposes, such as fake snow on Christmas ornaments.
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