"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."

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

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

"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."

"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."

"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."

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.

"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."

"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."