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A blueback herring.

River herring spend most of their lives in the Atlantic Ocean. They are anadromous fish species, which means they return to spawn in coastal rivers in the spring. But these small fish are in big trouble. Based on analysis by the National Marine Fisheries Service, their populations have declined more than 98 percent from their historic level.

An industrial incinerator frames a church playground in Midlothian, Texas.

(First published in the Huffington Post.)

Joe Poole Lake is a popular destination for Dallas and Fort Worth residents looking for a weekend escape to the great outdoors. Lined with barbecue grills, hiking trails and sandy beaches, the 7,400-acre lake and its wooden welcome sign invite endless opportunities to relax and unwind.

The Evergreen Community Power Plant (located at bottom center in the above image) is a small power plant that emits toxic chemicals, including lead and mercury. But the nearby community may not even know it's there because the facility avoids public discl

(This blog post first appeared in the Huffington Post on August 29, 2014.)

When you think about sources of toxic air pollution, one of the first things you might picture is a large power plant with huge smoke stacks belching black clouds into the sky. But the truth is that smaller power plants collectively contribute more to the cancer risk faced by Americans every day.

A sign warning of the presence of asbestos.

Every day, just in the course of normal activities, we are exposed to an unbelievable range of toxic chemicals that we may not know about. Of the 80,000 plus chemicals that have been approved to be on the market in the United States, approximately 24,000 are “secret”. Literally, we don’t know what they are.

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