"The number of polar bears in eastern Alaska and western Canada has declined by 40%, according to a scientific study that raises more questions about the impact of global warming on the creature that has become the symbol of some of its worst effects."

"As sea levels rise, as much as $1.4 trillion worth of coastal property could be threatened with flooding by 2100, by one estimate. But what will it cost to protect those properties? Now comes a hint at the enormous pricetag."

"Small seabirds are washing up dead on local beaches, an unusual phenomenon that suggests high ocean temperatures are causing starvation."

"A winter storm that has brought freezing temperatures to most of the continental U.S. has also dumped several feet of snow on Buffalo and the western parts of New York state and may break local and national records."

"Creepy critters are leaching onto the gills of Wisconsin's brook trout and choking off their oxygen, stoking fears in anglers that the iconic fish may be on the outs in many streams."

"The final G20 communique includes a significant passage on climate change after "difficult discussions" among leaders on Sunday, and despite an impassioned defence of coal and fossil fuel industry by Prime Minister Tony Abbott."

"President Barack Obama on Friday pledged a $3 billion U.S. contribution to an international fund to help poor countries cope with the effects of climate change, putting the issue front and center of the G20 Leaders Summit in Australia."

"SYDNEY - More than 400 protesters stuck their heads in the sand on Australia's Bondi Beach on Thursday, mocking the government's reluctance to put climate change on the agenda of a G20 summit this weekend."

"Lightning strikes in the United States will likely increase by nearly 50 percent by the end of the century as the world gets warmer and wetter, a new study says."