Scientific Consensus

Standard Page - 2006-01-06
There is a broad and overwhelming scientific consensus that climate change is occurring, is caused in large part by human activities, and if left unchecked will likely have disastrous consequences. Furthermore, there is solid scientific evidence that we should act now on climate change, and this is reflected in the statements by these definitive scientific authorities.

There is a broad and overwhelming scientific consensus that climate change is occurring, is caused in large part by human activities, and if left unchecked will likely have disastrous consequences. Furthermore, there is solid scientific evidence that we should act now on climate change, and this is reflected in the statements by these definitive scientific authorities.

Joint statement from 11 national academies of science

Issued June 7, 2005, by the national science academies of the United States, United Kingdom, France, Russia, Germany, Japan, Italy, Canada, Brazil, China and India, the statement begins:

Climate change is real

There will always be uncertainty in understanding a system as complex as the world’s climate. However there is now strong evidence that significant global warming is occurring. The evidence comes from direct measurements of rising surface air temperatures and subsurface ocean temperatures and from phenomena such as increases in average global sea levels, retreating glaciers, and changes to many physical and biological systems. It is likely that most of the warming in recent decades can be attributed to human activities (IPCC 2001). This warming has already led to changes in the Earth’s climate.

The statement goes on to conclude:

We urge all nations, in the line with the UNFCCC principles, to take prompt action to reduce the causes of climate change, adapt to its impacts and ensure that the issue is included in all relevant national and international strategies.

Full text of the statement on the NAS site

The Royal Society on climate change

Intergovernmental Panel on Climate Change

The Intergovernmental Panel on Climate Change (IPCC) was set up by the United Nations in 1988 to assess the scientific, technical and socio-economic information relevant for the understanding of the risk of human induced climate change. About 1,000 experts from around the world are involved in drafting, revising and finalizing IPCC reports. About 2,500 experts take part in the report review process. Thus, the IPCC represents a global consensus of the world's climate change experts.

The Intergovernmental Panel on Climate Change (IPCC).

Learn more about climate science:

Carbon dioxide
Super greenhouse gases: F-gases
Deforestation and climate change
Scientific consensus on climate change
Climate research

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