"This year's frenzy of oil and gas exploration in newly accessible Arctic waters could be the harbinger of even starker changes to come. If, as many scientists predict, currently inaccessible sea lanes across the top of the world become navigable in the coming decades, they could redraw global trading routes -- and perhaps geopolitics -- forever."

"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."

"By showing that Arctic climate change is no longer just a problem for the polar bear, a new study may finally dispel the view that what happens in the Arctic, stays in the Arctic."

"TOKYO — The damage to one of three stricken reactors at the Fukushima Daiichi plant could be worse than previously thought, a recent internal investigation has shown, raising new concerns over the plant’s stability and complicating the post-disaster cleanup."

"Why did the atmosphere contain so little carbon dioxide (CO2) during the last Ice Age 20,000 years ago? Why did it rise when the Earth's climate became warmer? Processes in the ocean are responsible for this, says a new study based on newly developed isotope measurements. This study has now been published in the scientific journal 'Science' by scientists from the Universities of Bern and Grenoble and the Alfred Wegener Institute for Polar and Marine Research in the Helmholtz Association."

"SYDNEY, Australia -- Earth Hour 2012 organizers are jubilant today after a satisfyingly successful global event on March 31. Lights went out at 8:30 pm local time as Earth Hour circled the world through a record 150 countries and territories, with 6,494 towns and cities participating."

"WASHINGTON -- The leaders of the United States, Mexico, and Canada [Monday] pledged to develop 'continental energy, including electricity generation and interconnection' across national borders and welcomed 'increasing North American energy trade.'"