14 Years Later, Here's What We Know About 9/11 and Cancer

After the Twin Towers fell, a layer of dust and debris coated Manhattan. Hidden among that cloudy air, inhaled by survivors and first responders alike, were carcinogenic particles and chemicals—asbestos, fiberglass, mercury, and benzene, among others. The Natural Resources Defense Council estimates that 300 to 400 tons of asbestos fibers were used to construct the World Trade Center.
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