The company that leaked a toxic chemical into the Elk River had told state officials about the contents of its riverside tanks. Why didn't officials draw up emergency plans?
More than 300 green groups release a letter saying no to nuclear, and climate scientist Ken Caldeira defends his reluctant support for the technology.
Maine is now the second state to mandate the labeling of foods containing GMOs, but the law will only take effect if other states follow its lead.
A new rule will just require the companies to tell the government which chemicals they're dumping.
A supplier to the coal industry spilled thousands of gallons of a toxic chemical into a river, poisoning local water supplies.
The agency still won't outlaw bee-killing pesticides, but it is funding research into reducing use of chemicals that harm pollinators.
Perhaps 1,000 people in Japan have been sickened by insecticide-laced foods, and more than 6 million packages of frozen food have been recalled.
Foul weather knocked some fossil-fuel power plants offline in Texas, leaving wind energy to save the day.
Presidential science advisor John Holdren explains that cold weather does not in fact disprove global warming.