The razorback sucker has been swimming in the Colorado River for an estimated 5 million years before humans nearly fished them out of existence. Now, high schoolers are teaming up with a local baseball team and the U.S. Fish and Wildlife Service to save this beloved fish.

Chicago has more than 400,000 lead water lines, the largest known municipal inventory of lead pipes in the country.

More than 150 million people in the United States live in areas affected by harmful levels of air pollution.

Colorado has joined several Western states in declaring statewide emergency drought declarations.

In cities across the U.S., parades were canceled and events were delayed because of the heat. Meanwhile, emergency rooms saw a high number of people with heat-related illnesses.

When a species is facing extinction, it takes an enormous human effort to stave it off.

A new riverkeeper is taking the helm in protecting the Yadkin. After spending the last two years as an assistant with the organization, Nicole Eastman is now leading Yadkin Riverkeeper’s efforts to protect the Yadkin-Pee Dee watershed.

Volunteers searching North Carolina waterways for pollution found tiny plastic pellets in Lake Brandt. Advocates say the material can threaten wildlife.

Americans love hamburgers. But are they good for the environment?

A heat wave in Chicago in 1995 killed more than 700 people and led to changes on how the city handles heat.