"The dramatic temperature increases that thawed the last ice age followed spikes in carbon dioxide levels in the air, a new study finds. Researchers say that further strengthens the scientific case explaining current man-made global warming."

Scientists say aerosols -- which encourage the formation of clouds, which in turn cool the earth -- may be changing ocean currents in ways that promote climate change.

"BANGKOK -- A floating mosque and golf course for the submerging Maldives islands. Amphibious homes in the Netherlands lifted to safety as waters surge beneath them. A hospital perched on 400 stilts to protect patients from Thailand's devastating floods and the encroaching sea."

"DUJIADUN, China -- Liu Changxiong has been farming in this southwestern Chinese village for more than a decade, but his years of experience aren't of much use these days."

Chicago's "sewer network, built and maintained by the Metropolitan Water Reclamation District of Greater Chicago, is a behemoth among urban wastewater collection systems. Girded by more than 109 miles of deep underground pipe, Chicago's massive 'Tunnel and Reservoir Plan' (TARP) ranks among the nation's largest public works projects, both in term of scale and cost, estimated at $3.58 billion."

Cattle grazed on land containing abandoned uranium mines in the West are being sold for food. What hazards, if any, this may present to people consuming the beef are unknown.

"TORONTO -- More than 130 large dams built, under construction, or proposed in western China's seismic hazard zones could trigger disasterous environmental consequences such as earthquakes and giant waves, finds a new report from the Canadian watchdog group Probe International."

"Darren Collins doesn't know life without Lyme disease. He was just 11 months old when he came home from Wisconsin's Mauthe Lake Campground pasty white, lethargic and running a fever of 105. Darren's flu-like illness eventually subsided, but a host of other troubling Lyme-related symptoms -- stomachaches, irritability and concentration problems -- have since plagued the boy, now 10."

"BOISE, Idaho -- It takes a lot to shock and sicken seasoned wildlife advocates, but the deliberate torture and shooting of a trapped wolf in northern Idaho by an employee of the U.S. Forest Service has. The incident in mid-March has triggered calls for both federal and state investigations leading to dismissal of the employee involved."