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A research program in New Zealand is meticulously measuring emissions from farm animals, one source of global warming gasses. Neil Sands/AFP/Getty Images hide caption

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Neil Sands/AFP/Getty Images

Waves pound a sea wall in Pacifica, Calif., during a storm in 2010. Small assumptions can make a big difference when putting a price-tag on future disasters. Paul Sakuma/AP hide caption

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Paul Sakuma/AP

Episode 388: Putting A Price Tag On Your Descendants

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A new program led by the U.S. seeks to limit amounts of soot, hydrofluorocarbons and methane released into the atmosphere. In this file photo from 2009, a researcher ignites trapped methane from under a pond's ice cap in Alaska. Todd Paris/AP hide caption

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Todd Paris/AP

The new version of the map includes 13 zones, with the addition for the first time of zones 12 (50-60 degrees F) and 13 (60-70 degrees F). U.S. Department of Agriculture hide caption

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U.S. Department of Agriculture