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Members of the 171st Air Refueling Wing Fire Department conduct training on July 7, 2007, on the Air National Guard base near Pittsburgh International Airport. Firefighting foam has been one of the largest sources of PFAS contamination. (U.S. Air Force photo taken by MSgt. Stacey Barkey)

Former firefighters describe how they used foam with PFAS chemicals at Pittsburgh's airport for decades

The foam, required by the Federal Aviation Administration, contains chemicals that are harmful and don't break down. Former firefighters say the foam was used liberally and rarely cleaned up.

Plastic recyclers in Nigeria. (Credit: King Baudouin African Development Prize/flickr)

Peter Dykstra: Eco-Overload

We're discovering new environmental menaces faster than we're solving the old ones.

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