"CHURCHILL, Manitoba -- A polar bear attack in Canada that left two people injured has brought new warnings from scientists of a dangerous rise in human-bear encounters in a warming Arctic."

"WASHINGTON -- Environmentalists are poised to become the second-biggest contributor to the effort to elect Democrat Terry McAuliffe as the next governor of Virginia, trailing only the Democratic Governors Association in spending on his campaign."

"SANTA BARBARA, Calif. — The violet bottom-dwelling, prickle-backed spheres wriggling in the tank in Gretchen Hofmann’s lab aren’t really known for their speed. But these lowly sea urchins adapt so quickly they’re helping answer a question that’s key to understanding ocean acidification."

"As fossil-fuel emissions disrupt marine life, will evolution come to the rescue?"

"Australia and the US used the 2007 United Nations climate change conference in Bali to carry out a joint surveillance operation on Indonesia, according to reports."

"Tea Party Republicans succeeded in grinding the federal government to a halt, and they are the biggest holdouts in the face of overwhelming evidence that climate change is happening. Mainstream Republicans, however, are much less likely to reject the fact that the planet is getting hotter."

"New Jersey may have been stronger than the storm, but the sea will prove stronger in the long run, scientists fear."

"President Barack Obama issued a series of steps Friday to help the nation combat global warming, an issue that may reignite partisan battle lines in Washington."

"Starvation, poverty, flooding, heat waves, droughts, war and disease already lead to human tragedies. They're likely to worsen as the world warms from man-made climate change, a leaked draft of an international scientific report forecasts."

Flooding from Storm Sandy last year inspired urban designer Alexandros Washburn to devise new ways to protect his vulnerable home in Red Hook, Brooklyn -- and, he hopes, those of his neighbors.

"Much of the world is turning hotter and dryer these days, and it's opening new doors for a water-saving cereal that's been called 'the camel of crops': sorghum. In an odd twist, this old-fashioned crop even seems to be catching on among consumers who are looking for 'ancient grains' that have been relatively untouched by modern agriculture."