"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."

"Greenhouse gas emissions from U.S. power plants fell 4.6 percent in 2011 as more generators were switched to cleaner-burning natural gas and renewable sources from coal, according to new data from the Environmental Protection Agency."

"The United States will struggle to reduce greenhouse gas emissions to promised levels by 2020, a report from a prominent think tank warned this week, but the federal government, states and industry already have the means at their disposal to achieve such goals."

"As North Carolina Gov. Pat McCrory's budget director, Art Pope will help make important fiscal decisions for a state facing serious threats due to climate disruption, from destructive storms and more intense hurricanes to unusually fast-rising seas. But he will carry out that work in a political context that's been shaped by disinformation about climate science -- thanks to efforts Pope himself has generously funded."

"Greenhouse gas emissions from U.S. power plants fell 4.6 percent in 2011 as more generators were switched to cleaner-burning natural gas and renewable sources from coal, according to new data from the Environmental Protection Agency."

"U.S. Energy Secretary Steven Chu, the Nobel Prize winner who shepherded an effort to help spur a clean energy U.S. economy, will step down after a tenure rocked by the failures of some costly government investments."

"The U.S. government on Friday proposed adding wolverines, feisty but rare members of the weasel family, to the federal threatened and endangered species list because global warming is reducing the mountain snows the animals need for survival."

"When red knots descend on the beaches of Delaware Bay this spring famished from their marathon flight toward the Canadian Arctic from the tip of South America, the rosy-breasted shorebirds may find slim pickings instead of the feast of horseshoe crab eggs they count on to fuel the rest of their migration."

"Citing shrinking mountain snowpacks as a result of climate change, federal wildlife officials are proposing to list wolverines as threatened under the Endangered Species Act."

"The unrelenting drought gripping key farming states in the U.S. Plains shows no signs of abating, and it will take a deluge of snow or rain to restore critical moisture to farmland before spring planting of new crops, a climate expert said on Thursday."

"Superstorm Sandy was a dramatic preview of what cities on the Eastern Seaboard might expect as climate change intensifies, but 12 small, indigenous communities on Alaska's coast provide the most extreme example of how global warming can wreak havoc."

"The American Legislative Exchange Council (ALEC) - known by its critics as a 'corporate bill mill' - has hit the ground running in 2013, pushing 'models bills' mandating the teaching of climate change denial in public school systems."

"Butterflies from the southern US that used to be rare in the northeast are now appearing there on a regular basis. The trend correlates to a warming climate report the authors of a paper in Nature Climate Change."

"It's a lake, yes. But it's also a bomb. Those pale blue blobs, stacked like floating pancakes down at the bottom of this photograph? They're astonishingly beautiful, yes, but they can be dangerous."