High levels of toxic 'forever chemicals' in the airport’s stormwater are being discharged into tributaries of Montour Run, a popular stream in Allegheny County.
The Conestoga River flows through downtown Lancaster, suburbs and farmland. Polluted by sewage and agricultural runoff, the river is also popular for recreation.
The 279-acre parcel in Cambria County represents a critical rest stop along an important migratory route stretching 200 miles through the Appalachians.
Study authors used botanical records from over 100 years to explore how native wildflower bloom dates in Pennsylvania have changed over time due to climate change.