New Mexico Attorney General Hector Balderas is seeking mine waste controls in the wake of the spill into the Animas River last year.
Flying above the East Antarctic Ice Sheet, researchers say the Totten Glacier has been unstable before, and it may be again soon.
A rescue team responded to reports of a humpback whale off the coast of Gloucester, Mass. on Wednesday, one of the thousands of whales entangled by fishing gear each year.
Last year's nest totals in Georgia and the Carolinas were record-setting for loggerhead sea turtles. So far, this year's numbers are looking good as well.
Conservationists are urging the Mexican and Chinese governments to take action to save the world's most endangered marine mammal, the vaquita porpoise.
Two beaches in Southern California have been inundated by hundreds of bright red and orange crabs, in what experts believe is an event linked to El Niño.
Improving air quality for low-income nations would not only improve public health for millions of people, but would also help alleviate global greenhouse gas woes.