A mysterious ailment is causing algal blooms and killing dolphins, manatees, and pelicans along the Indian River Lagoon, one of the most valuable and diverse ecosystems in North America.

"If things were this bad in the late 1770s, George Washington’s starving Continental Army might never have made it out of Valley Forge."

"The latest domestic energy boom is sweeping through some of the nation's driest pockets, drawing millions of gallons of water to unlock oil and gas reserves from beneath the Earth's surface."

"TransCanada Corp., which says Keystone XL will be the safest pipeline ever built, isn’t planning to use infrared sensors or fiber-optic cables to detect spills along the system’s 2,000-mile (3,200-kilometer) path to Texas refineries from fields in Alberta."

"DAMASCUS, Va. -- This is a heck of a bad time for the hellbender."

"Efforts to curb global warming have quietly shifted as greenhouse gases inexorably rise."

"When does a nuclear plant become too old? The nuclear industry is wrestling with that question as it tries to determine whether problems at reactors, all designed in the 1960s and 1970s, are middle-aged aches and pains or end-of-life crises."

"CROW AGENCY, Mont. — Every few hours trains packed with coal pass through the sagebrush-covered landscape here in southern Montana, some on their way north to Canadian ports for shipment to Japan and South Korea. If the mining company Cloud Peak Energy has its way, many more trains will cross the prairie to far larger proposed export terminals in Washington State."

"Could your driveway be making you sick? Mounting research suggests it could. It's prompting more cities, states and businesses to ban a common pavement sealant linked to higher cancer risks and contaminated soil."

"BALTIMORE, Md. -- Gov. Martin O'Malley has interceded with the U.S. Environmental Protection Agency on behalf of Carnival Cruise Lines after the company threatened to pull its business from Baltimore over a pending air-quality regulation that would require large, ocean-going ships to burn cleaner fuel."

"There's fresh evidence that the chemical bisphenol A, or BPA, may play a part in childhood obesity."

"A solar-powered plane nearing the close of a cross-continental journey landed at Dulles International Airport outside the nation’s capital early Sunday, only one short leg to New York remaining on a voyage that opened in May."

"State and federal investigators in Louisiana are working to uncover what caused fatal blasts at two different chemical plants in the span of two days."

"HONG KONG -- China’s cabinet has adopted 10 measures to improve air quality in the latest move aimed at responding to the dense smog that has repeatedly enveloped Beijing and other major Chinese cities in recent years."

"None of the companies operating in Canada's tar sands have met a commitment to clean up the vast and expanding sprawl of toxic waste ponds, an official report has found."