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On this week's episode:

We're launching a new series about the Monongahela River. From the mountains of West Virginia, through valleys, into downtown Pittsburgh, the Mon has seen industrial growth and decline, and weathered the pollution that came with it. The Mon and its tributaries are also home to wildlife facing new challenges, like the mussels of Dunkard Creek. Plus, we'll get a lesson on how to pronounce the river's name.

Some electricity customers learned they've been paying hidden costs for power from two coal-fired power plants. Companies looking to build new power plants or factories may be able to start construction before getting required air pollution permits. Sign up for our newsletter! Get our newsletter every Tuesday morning so you'll never miss an environmental story.