"The Obama administration moved Thursday to restrict the use of hydrofluorocarbons (HFCs), the most potent greenhouse gases emitted by human activity."

"A helicopter pilot who repeatedly flew over Curry County homes while spraying herbicides on clear cuts in 2013, drawing 20 complaints of illness, will not face any monetary fine from the state."

"A chemical used in sodas and some laxatives for years assumed safe by federal health officials might make people more prone to obesity."

MARYVILLE, Tenn. -- "A CSX tanker car carrying acrylonitrile caught fire just after midnight Thursday morning forcing the evacuation of more than 5,000 people in an expanding evacuation zone last listed as a 2-mile radius around the site."

"Use of the third most popular pesticide in the U.S. is predicted to grow dramatically in the next few years."

"The fields are heating up, there are little black rubber pellets everywhere, and feet are covered with blisters."

"The EPA will begin analysing the impacts of Atrazine and Glyphosate, the two most-commonly used pesticides in the U.S., on 1,500 plant and animal species in the U.S. under the terms of a settlement reached today with the Center for Biological Diversity."

"The House on Tuesday approved a bipartisan bill that would update regulation of harmful chemicals for the first time in nearly 40 years."

"Strife within the U.S. Chemical Safety and Hazard Investigation Board (CSB) has burst into the open again with one board member seizing control and ordering immediate suspension of the agency’s entire executive staff."