"LONDON -- The Arctic needs to be better protected from a rush for natural resources as melting ice makes mineral and energy exploration easier, the United Nations' Environment Programme (UNEP) said."

Two new scientific studies explain a paradox: climate change is likely to bring more blizzards but less snow overall. It's physics.

"Event billed as largest climate protest in US history intended as show of force as Obama nears decision on controversial project."

"U.S. farmers will plant crops this spring under the shadow of a persistent drought that grips prime farmland from the mississippi river to the rocky mountains, with grain supplies already tight from drought losses in 2012."

"A thaw of sea ice floating on the Arctic Ocean last year sent extra plant food to exotic creatures on the deep sea floor in a shift that might leave polar bears hungry at the surface, scientists said on Thursday."

"Millions of birds have descended on a small Kentucky city this winter, fouling the landscape, scaring pets and raising the risk for disease in a real-life version of Alfred Hitchcock's horror film, The Birds."

"The U.S. government is at high risk of financial exposure from climate change, the Government Accountability Office said on Thursday, two days after President Barack Obama vowed to tackle the issue with or without Congress' help."

"Anonymous billionaires donated $120m to more than 100 anti-climate groups working to discredit climate change science."

Some 48 prominent activists were arrested at the White House Wednesday when they protested the proposed Keystone XL pipeline, which they say will worsen climate change. The Obama administration faces an upcoming decision on completing the pipeline.

"Two-thirds of Americans want President Barack Obama to act now on climate change, adding momentum to his state of the union promise to take up the challenge with or without Congress."

"Democrats in Congress wasted no time in taking up President Barack Obama’s challenge Tuesday night that lawmakers take a 'market-based' approach to addressing climate change, even if their effort has little hope of success."

"U.S. President Barack Obama on Tuesday gave Congress an ultimatum on climate change: craft a plan to slash greenhouse gas emissions and adapt to the dangers of a warming world, or the White House will go it alone."

"This year, the Commerce Department will investigate the feasibility of a bicycle share program. The Agriculture Department's Risk Management Agency will redraw planting zone maps for the purposes of insuring nursery-grown plants. And the Department of Defense will scale down its fleet of gas-guzzling Humvees. These are all examples of steps federal agencies will take in 2013 in an effort to deal with the risks of future climate change. The Obama administration released its first climate change adaptation plans Thursday, as part of the annual sustainability reports."

"President Barack Obama’s annual addresses to Congress offer a glimpse at a leader whose rhetoric on energy and the environment has changed dramatically over the past four years -- from his calls to pass sweeping climate legislation in 2009 to a full-throated embrace of natural gas last year."

"A comprehensive USDA study concludes rising temperatures could cost farmers millions as they battle new pests, faster weed growth and get smaller yields as climate change continues."