"Most of the biggest polluting industrial boilers are in manufacturing states east of the Mississippi River, but 68 dot the West coast states."

"The war of words between the Obama reelection campaign and billionaire conservative activists Charles and David Koch escalated Wednesday. The president's campaign manager, Jim Messina, sent a letter to Philip Ellender, Koch’s president for government and public affairs, disputing Ellender's claim that an organization partially backed by the brothers represented the interests of thousands of grassroots donors."

"LOS ANGELES -- The U.S. Forest Service plans to grant free access to nearly all national forest lands, scaling back unpopular recreation fees that have raised the ire of hikers but also sent millions of dollars to Southern California's heavily used forests."

"Twenty-six-year-old Sara Barnes was arrested in Seminole County, Fla., after she admitted to setting fire to one of the oldest trees in the world."

"HARRISBURG, Ill. — A pre-dawn twister flattened entire blocks of homes in a small Illinois town Wednesday as violent storms ravaged the Midwest and South, killing at least 12 people in three states."

"The House approved a bill Wednesday that rewrites two decades of water law in California, wiping out environmental protections and dropping reforms of federal irrigation policy that have long irritated agribusiness in the Central Valley."

"When US President Barack Obama proposed a US$664-million cut in congressional funding for the US Centers for Disease Control and Prevention (CDC) in his 2013 budget request, he tried to ease the pain by replacing much of it with money from other sources. But only days after the 13 February request, a vote on Capitol Hill made clear just how vulnerable those substitutions are, suggesting that the US public-health agency is on increasingly shaky financial ground."

"Chicago's two coal-fired power plants will shut down sooner than expected under a deal to be announced today by Mayor Rahm Emanuel and environmental groups."

"Senate Energy and Natural Resources Committee Chairman Jeff Bingaman (D-N.M.) will introduce legislation Thursday mandating that power companies generate a major portion of the country’s electricity from low-carbon energy sources."