The Environmental Integrity Project says about a million more pounds of nitrogen pollution are getting into the bay. Half of Pa. land drains into the Chesapeake.
Allegheny College and Dickinson College join only a handful of other schools across the nation to do the same. Both schools say a big part of their role is to educate the next generation of climate leaders.
The invasive plant is pitting conservationists who want it removed to protect native species against land managers who say it's keeping coastal land intact.
Pa.'s climate assessment predicts chicken farms will move to Pennsylvania to escape sweltering temperatures in the South, causing more water pollution.
The two Washington County communities where the violations took place can apply to use part of the nearly $200,000 fine toward local parks and pollution reduction efforts.