"Anchorage is one of the few North American cities that depend on a glacier for most of their drinking water. The Eklutna glacier also provides some of the city's electricity, through hydro power. So a team of researchers is working to answer a very important question: How long will the glacier's water supply last?"

"Environmental advocates readied for battle in Congress this week over what they maintain is an erosion of protections for the biggest, oldest trees in Alaska's Tongass National Forest, often called the crown jewel of the U.S. forest system."

"The remote Aleutian site known for two centuries as Rat Island, notorious as the first spot in Alaska despoiled by rats, has a new, more dignified name to celebrate its hard-won rodent-free status - but it may be harder for some to pronounce."

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President Obama's preoccupation with Shell's proposal to drill for oil in the offshore Arctic -- even after the BP spill in the Gulf of Mexico -- appears to signal that it will be inevitable, barring a major legal challenge.

"Large stretches of salmon-spawning streams and thousands of acres of wetlands would be wiped out if a large-scale mining project were to be built in southwestern Alaska's copper-rich Bristol Bay region, according to a report issued Friday by the Environmental Protection Agency."

"Fearing numerous villages may be at risk of toxic releases as landfills erode and thawing permafrost undercuts tank farms, state environmental managers have embarked on a massive effort to address the growing potential for pollution faced by some 100 communities across Alaska."

"Shell Oil plans to explore for petroleum off Alaska's north coast this summer. The native people of Alaska have a big stake in both oil revenue and environmental protection. That conflict has played out in recent trips by Inupiats to Washington, D.C., to argue their case."

"After one of the biggest environmental fights in decades, exploratory drilling is expected to begin in July off the state's north coast. The company has plans in case of a spill; opponents say normal operations will still release damaging chemicals."

"ANCHORAGE -- U.S. Forest Service researchers have confirmed what has long been suspected about a valuable tree in Alaska's Panhandle: Climate warming is killing off yellow cedar."