You don't see this every day. President Barack Obama used Twitter today to call out climate deniers in Congress who are blocking political action to address climate change. 
The tweet links to this video released by Organizing for Action, the 501(c)(4) campaign group that promotes the President's national agenda.
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650,000 years
A study of the Antarctic ice cap recently revealed that there is currently 27 percent more CO2 in the air than at any time in the last 650,000 years. And one-third more CO2 than at the start of the industrial revolution. Anyone who doesn't believe in global warming at this point just has their head in the sand.