CIA intelligence analysts have focused more intensely in the past year on a threat to national security they find highly worrisome: geopolitical chaos caused by climate change. Speaking on background, they say the U.S. is frighteningly unprepared. The CIA analysts must stay anonymous, because the public is not supposed to know.

"A study predicts there will be havoc akin to a big-budget Hollywood disaster movie in the next 1,000 years even if people stop emitting all carbon dioxide into the atmosphere now."

"As the new decade opens up, researchers are gathering data that will redefine weather pattern averages for the nation."

"House Republicans wasted no time Thursday in trying to block the Obama administration from acting to stem global warming." Whether they have the votes to succeed is uncertain.

"The United Nations Food and Agriculture Organization announced this week that food prices hit a record high last month. Its Food Price Index was 214.7 for December, the highest level since the organization created the index to measure the price of a standard basket of goods in 1990."

"After spiking upward in response to Copenhagen talks and the 'climategate' uproar, media coverage of climate change plummeted to levels last seen in 2005, according to DailyClimate.org's archives and other media databases."

"Scientists have found evidence of a 'drastic' shift since the 1970s in north Atlantic Ocean currents that usually influence weather in the northern hemisphere, Swiss researchers said on Tuesday."

"MIT professor Kerry Emanuel is among a rare breed of conservative scientists who are sounding the alarm for climate change and criticizing Republicans' 'agenda of denial' and 'anti-science stance.'"

Rep. Fred Upton (R-MI), incoming chairman of the House Energy Committee, used to be in favor of reducing the carbon dioxide emissions which are the biggest cause of global warming. Now he is against it.