National Science Foundation
To What Degree What Science Is Telling Us About Climate Change
Leading climate change experts discuss one of the most complex scientific puzzles ever to confront humankind.

 

NSF.gov
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Leading climate change experts discuss one of the most complex scinetific puzzles ever to confront humankind. How do we know the earth is warming? How do we know the warming is caused by rising levels of carbon dioxide? How close are we to having all the answers?

Intergovernmental Panel on Climate Change What is the IPCC and what's it like to participate in that process? What steps are involved in creating an IPCC assessment? Why does it take years to put together one IPCC Assessment Report? Who approves the IPCC documents that are provided to policymakers? What makes IPCC assessments different from other scientific assessments? Once the scientists review all the literature, how do they debate individual scientific issues? What are the chances the IPCC is over- or underestimating the impacts of climate change? How is the IPCC assessing climate change, even as the science behind it evolves? How has the scientific consensus evolved from the first IPCC report in 1990 to the most recent? Why hasn't the IPCC suggested public policies based on its findings?

Meet the Experts