Climate change 2007: IPCC fourth assessment report (AR4)

The Synthesis Report was launched in Valencia, Spain, on 17 November 2007 during a press conference.

The report is based on the assessment carried out by the three Working Groups of the Intergovernmental Panel on Climate Change (IPCC). It provides an integrated view of climate change as the final part of the IPCC’s Fourth Assessment Report (AR4).

Topic 1: Summarises observed changes in climate and their effects on natural and human systems, regardless of their causes.
Topic 2: Assesses the causes of the observed changes.
Topic 3: Presents projections of future climate change and related impacts under different scenarios.
Topic 4: Discusses adaptation and mitigation options over the next few decades and their interactions with sustainable development.
Topic 5: Assesses the relationship between adaptation and mitigation on a more conceptual basis and takes a longer-term perspective.
Topic 6: Summarises the major robust findings and remaining key uncertainties in this assessment.