"Responding to public pressure to act more quickly after a series of fiery train derailments involving oil shipments, the Transportation Department on Friday issued a series of emergency orders, including a 40-mile-an-hour speed limit for hazardous materials moving through urban areas."

"A large majority of Americans support taxing carbon emissions, according to polling results released yesterday, and favorability rises to two-thirds if the tax is used to send money back to households."

"In the past few weeks, there’s been a battery of new studies on batteries. Not the kind in your cellphone, but a much more revolutionary make – the kind that is already powering many cars, and that might someday help power your home."

"OVER THE GULF OF MEXICO — A blanket of fog lifts, exposing a band of rainbow sheen that stretches for miles off the coast of Louisiana. From the vantage point of an airplane, it's easy to see gas bubbles in the slick that mark the spot where an oil platform toppled during a 2004 hurricane, triggering what might be the longest-running commercial oil spill ever to pollute the Gulf of Mexico."

"WASHINGTON — A panel of federal judges appeared inclined on Thursday to dismiss the first legal challenge to President Obama’s most far-reaching regulation to slow climate change."

"TV weathercasters are more convinced than ever climate change is happening and that human activities are a major contributor suggest the results of a new report."

"A House committee approved a bill Wednesday granting states authority to regulate waste generated from coal burned for electricity, largely bypassing a federal rule issued last year."

"Three decades after EPA left regulation to states, they're still taking a 'see no evil' approach to oil-and-gas-waste, Earthworks says."

"After more than a decade of delays, the government is moving toward allowing the sale of U.S.-raised organic fish and shellfish. But don't expect it in the grocery store anytime soon."

"Environmentalists seeking to curb the deaths of an estimated 53,000 sea turtles each year from getting caught in commercial shrimp nets off the southeastern United States sued federal regulators on Wednesday for stronger protections."