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December 14, 2009
On Friday, Dec. 11, Tom Karl was the guest for a live webchat with Washington Post readers about the science of climate change.
The entire chat, Global Warming: What the Science Tells Us, is available online. (Source: The Washington Post/Discussions)
For more information on the science and the wide range of data scientists are using to understand climate change, visit NOAA's National Climatic Data Center Climate Indicators page.