Because there is no safe level of exposure to asbestos.
From the above Reuters article
"The World Health Organization and other authorities recognize no safe level of exposure to asbestos. While most people exposed never develop cancer, for some, even small amounts of asbestos are enough to trigger the disease years later."
From the above Reuters article "The World Health Organization and other authorities recognize no safe level of exposure to asbestos. While most people exposed never develop cancer, for some, even small amounts of asbestos are enough to trigger the disease years later."
https://www.reuters.com/investigates/special-report/johnsona...