"AZTEC, N.M. — The land is parched, the fields are withering and thousands of the nation’s horses are being left to fend for themselves on the dried range, abandoned by people who can no longer afford to feed them."

"ABOARD THE DREDGE POTTER, on the Mississippi River — This ship is making sure that the Big River, shrinking under one of the worst droughts in modern history, stays deep enough."

"Wildfires sparked by lightning near Canada's Hudson Bay are threatening the habitat of polar bears, encroaching on the old tree roots and frozen soil where females make their dens, a conservation expert on the big, white bears said on Thursday."

"Ever since comprehensive legislation to reduce greenhouse gases died in Congress two years ago, my colleague John Broder noted here recently, climate change has been the issue that national politicians seem to avoid at all costs. Supporting renewable energy? Fine. Advocating energy independence? Great. Calling for action on global warming? Not so much."

"ST. LOUIS -- The worst drought in the U.S. in decades may be leveling off or even be easing ever so slightly in some lucky locales, federal weather forecasters announced Thursday in a report of little comfort for farmers and ranchers who already have begun tallying this year's losses."

"The modern world has long thought of refugees in strictly political terms, victims in a world riven by competing ideologies. But as climate change continues unabated, there is a growing population of displaced men, women and children whose homes have been rendered unlivable thanks to a wide spectrum of environmental disasters."

"The Arizona city already logs more days over 100 degrees than any U.S. city, and climate researchers predict Phoenix will grow hotter still in the coming decades. Planners are taking the projections seriously, and are looking for ways to adapt the city and its residents to a hotter, drier reality."

"President Obama promotes wind energy in Iowa while Mitt Romney defends the coal industry before a group of miners in Ohio."