"CARLSBAD, N.M. -- Just after the local water board announced this month that its farmers would get only one-tenth of their normal water allotment this year, Ronnie Walterscheid, 53, stood up and called on his elected representatives to declare a water war on their upstream neighbors."

"By the time today's K-12 students grow up, the challenges posed by climate change are expected to be severe and sweeping. Now, for the first time, new federal science standards due out this month will recommend that U.S. public school students learn about this climatic shift taking place."

"President Barack Obama's plan to use federal agencies, and the Environmental Protection Agency in particular, to drive his second-term climate change agenda might be in peril if he cannot fill vacant seats on the federal court that has jurisdiction over major national regulations, legal experts say."

"NOAA predicts tough spring for already struggling farmers as growing demand for water leaves US more exposed dry seasons."

"Polar bears' territorial tendencies and the diminishing ice season on Hudson Bay are conspiring to leave the animals less time to eat, researchers say. This bodes ill for their ability to reproduce, and survive."

Powerful Atlantic storms threaten long-settled areas on a Massachusetts barrier island.

"The number of Atlantic storms with magnitude similar to killer Hurricane Katrina, which devastated the U.S. Gulf Coast in 2005, could rise sharply this century, environmental researchers reported on Monday."

"Missouri Republican Sen. Roy Blunt said on Monday that he is placing a hold on Gina McCarthy, President Obama’s pick to run the Environmental Protection Agency, which could delay a full Senate vote on the nominee."

"The Obama administration is leaning toward revising its landmark proposal to regulate greenhouse gas emissions from new power plants, according to several individuals briefed on the matter, a move that would delay tougher restrictions and could anger many environmentalists."

"WASHINGTON, DC -- Hunters and anglers from across the United States are concerned about the impact of climate change on wildlife and natural resources and also on the U.S. hunting and angling economy, worth roughly $120 billion a year."

"A new report says you’re likely to be feeling less pain at the pump than in years past – and not just because gas prices are down a bit this week. Cars and trucks are getting better mileage than ever, and the air is cleaner as a result."

"President Barack Obama is preparing to tell all federal agencies for the first time that they have to consider the impact on global warming before approving major projects, from pipelines to highways."

"Key weather and climate satellites would get a boost under a new Senate spending proposal."

"WASHINGTON -- The amount of heat-trapping carbon dioxide in the air jumped dramatically in 2012, making it very unlikely that global warming can be limited to another 2 degrees as many global leaders have hoped, new federal figures show."

"CAMBRIDGE — America’s top military officer in charge of monitoring hostile actions by North Korea, escalating tensions between China and Japan, and a spike in computer attacks traced to China provides an unexpected answer when asked what is the biggest long-term security threat in the Pacific region: climate change."