Failure to act on climate change could cause an estimated 57,000 deaths a year in the United States from poor air quality by 2100, the Obama administration argued in a report released Monday that warns of dire effects of global warming.

The Environmental Protection Agency report argues that action now on climate could save billions in avoided costs for maintenance and repairs on roads and bridges made vulnerable by global warming and save the lives of an estimated 12,000 people in 49 U.S. cities who could die from extreme temperatures in 2100.

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Photo credit: The National Guard (Flickr).