Biofuel producers are teaming up with farms, meatpackers and waste management companies to tap the gassy waste on farms to make renewable jet fuel and diesel for vehicles.
In an effort to meet EPA regulations, conserve water and prevent algae growth in the Los Angeles Reservoir, officials are using 96 million plastic balls to cover the water's surface.
When it comes to new regulations for existing coal-fired power plants, Colorado is ahead of the curve. But the state's governor and attorney general are clashing over next steps.
Male humpback whales create "songs" together, scientists say. Katy Payne was the first to hear the shifts in pitch and pattern in the collective calls as complex music — haunting, evolving tunes.
Christopher Clark, an engineer turned whale biologist, wired the world's oceans with hydrophones. Whales sing as they migrate, he learned. And the ship sounds clouding the ocean can deeply interfere.
The Environmental Protection Agency is aiming to cut methane emissions by 40 to 45 percent over the next 10 years. The new regulations are expected to regulate emissions from the oil and gas industry.
The spill of heavy metals into the Animas River has contaminated water for hundreds of farmers in the Navajo Nation downstream, bringing up memories of past environmental disasters.
Pope Francis' encyclical on the environment is getting a thorough reading in Wyoming, which is the country's top coal-producing state. The letter presents a moral framework for approaching issues such as global climate change, but it's a difficult subject for Catholics in coal country.
The Environmental Protection Agency accidentally released millions of gallons of pollutants into a Colorado river last week. John Flick, owner of a fishing shop in Durango, Colo., discusses the spill.
After a scientist on a hike in Sequoia National Park saw trees with thin and browning needles, it got scientists thinking: Did the drought cause this? So they're climbing up them to study the damage.