Human Hair Buildup in Metro System Poses Fire Threat

[user97]

Hair and other human fibers are accumulating in Washington D.C. Metro tunnels in such large quantities that the gunk poses a threat of electrical sparks and fire, a transit consultant tells News4.

So much hair and skin cells build up on insulators that support the electrified third rails that the mess looks like a thick layer of felt................................

https://www.nbcwashington.com/news/local...Risks.html