This section provides answers to frequently asked questions about climate change. In each of the three first sections ("The physical science basis on climate change", "Climate change impacts, and adaptations and vulnerabilities" and "Mitigation of climate change"), FAQs 1 to 3 were prepared by the editorial team of www.greenfacts.org. Each answer represents a summary of a detailed text, directly sourced from IPCC "Fourth Assessment Report (AR4)", produced in 2007 by a large international panel of scientists. In addition, FAQs 4 to 22 of the section "The physical science basis on climate change" are directly sourced from the Working Group I report "Climate Change 2007: The Physical Science Basis" of IPCC "Fourth Assessment Report (AR4)". All other FAQs were prepared by the EEA.