Opinion: Engaging in citizen science is a great way to do something positive for the natural world during a time of environmental, political, and economic uncertainty.

If you're wondering what hummingbird species are in your backyard, check out the 15 types of hummingbirds that breed in the United States.

The Trump administration has given 68 coal-fired power plants, including one in Arizona, an additional two years to comply with tougher emissions regulations. The Apache Generating Station ...

President Donald Trump called for the Cholla Power Plant to be saved from closure soon after a letter from Arizona Republican lawmakers. APS, the plant's operator, closed the plant due to economic ...