Asbestos is a bigger problem than we thought
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Veritasium·Science & Education

Asbestos is a bigger problem than we thought

TL;DR

Asbestos still kills roughly 10,000 Americans yearly because industry suppression, flawed detection rules, and weak bans left it everywhere.

Key Points

  • 1.Asbestos is a naturally occurring silicate mineral whose scroll-like fiber structure resists heat up to 600°C, making it fireproof and weavable — properties that drove its use in nearly every U.S. building from 1900–1980.
  • 2.Worker Nellie Kershaw died at 33 from asbestosis in the 1920s; her case prompted Dr. William Cook's first medical description of the disease, yet industry continued suppressing findings for decades after.
  • 3.Dr. Irving Selikoff used FBI wartime records to prove shipyard asbestos exposure was deadlier than combat — 14 per 1,000 workers died from asbestos cancers vs. 8.6 per 1,000 soldiers killed in action.
  • 4.Internal Sumner Simpson papers revealed Johns Manville and Raybestos Manhattan secretly funded and then edited or buried Saranac Laboratories' animal studies to hide evidence that asbestos causes cancer, while deliberately not informing workers of positive diagnoses until at least 1971.
  • 5.The EPA issued a near-total asbestos ban in 1989, but courts overturned it in 1991 on a legal technicality; the U.S. only banned chrysotile asbestos in 2024, still allowing 12-year phase-outs and leaving five other asbestos types unaddressed.
  • 6.Asbestos forms naturally alongside other minerals like talc and vermiculite; WR Grace's Libby, Montana mine contaminated the town for decades, causing ~200 deaths in a population under 3,000 and prompting the EPA's worst industrial poisoning declaration in 2009.
  • 7.Independent researchers found asbestos fibers in Claire's cosmetics and children's toys as recently as 2017; testing also confirmed 30–50 million asbestos structures per gram of mud at a popular Las Vegas off-roading dry lake bed with no public warning signs.
  • 8.After 9/11, the EPA used polarized light microscopy (PLM) — a method that misses fibers below 1% by weight and under 5 micrometers — rather than transmission electron microscopy (TEM), declaring the air safe; 6,781 registered World Trade Center health program members have since died from exposure-linked illnesses.
  • 9.The official regulatory definition of asbestos covers only six minerals; cleavage fragments and naturally occurring fibers outside those categories are legally "not asbestos," even though animal studies show cleavage fragments cause severe disease — meaning current exposure assessments are structurally misleading.
  • 10.Global asbestos use continues aggressively: India imported over 350,000 tons in 2019 alone, with an estimated 6 million Indians projected to develop asbestos-related diseases in coming decades; worldwide, approximately 2.8 million deaths are forecast by 2035.

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