The dense, multiyear ice that holds the polar ice cap together is disintegrating, and scientists say it is not coming back.

"Tax credits for making your home more energy efficient got a lot of early buzz. The promise of up to 1500-dollars back for insulation and windows or efficient furnaces led to a flurry of advertising." But something might be stopping people from taking advantage of the tax credits.

"Too many boats and technology that is too good mean that nations must cooperate to preserve tuna and other fish stocks."

"A government study found that a group of endangered beluga whales in Alaska is declining, raising concern that bolstered protection for the animals is not coming quickly enough."

"The Senate Environment and Public Works Committee is hemorrhaging staff as it faces a critical test in the coming weeks to pass a comprehensive global warming bill."

An International Energy Agency report says that "China will be able to slow the growth of its emissions much faster than commonly assumed because of its rising investment in wind and nuclear energy and its newfound emphasis on energy efficiency."

"Silicon Valley investors are pointing to something called cleantech -- alternative energy, more efficient power distribution and new ways to store electricity, all with minimal impact to the environment -- as a candidate for the next boom."

"More than half of the nation's state attorneys general and two dozen interest groups have weighed in on a high-profile regulatory takings case that the Supreme Court will hear in December."

"The Interior Department moved closer to establishing habitat protections for the polar bear yesterday by sending its proposed rule to the White House Office of Management and Budget for review."