"For months, worried parents in Flint, Mich., arrived at their pediatricians’ offices in droves. Holding a toddler by the hand or an infant in their arms, they all have the same question: Are their children being poisoned?"

"It's the big donors who are driving the party's do-nothing policies."

In a complex legal settlement with the Sierra Club, Ohio's American Electric Power Company would eventually convert three coal-burning plants totalling 1,500 megawatts to natural gas and bring online 900 megawatts of wind and solar.

"Pigweed, with its ability to quickly adapt genetically, has developed Roundup herbicide resistance nearly as quickly as the crops altered by scientists to do so."

"The latest report on the health of the Arctic reveals melting ice, shifting habitats and changes that may one day be mirrored around the world."

"Surging demand for trucks and SUVs fueled by cheap gasoline is holding back improvements in U.S. fuel economy and greenhouse gas emissions, a government report due out on Wednesday is expected to show."

"Islamic State is looking at potentially vulnerable oil assets in Libya and elsewhere outside its Syria stronghold, where the militant group controls about roughly 80 percent of the oil and gas fields, a senior U.S. official said on Tuesday."

"Southern California Gas Co. says it detected a gas leak on Oct. 23 in its Aliso Canyon storage facility. A month and a half later, it still hasn't been able to stop it."