Radioactive contamination is the uncontrolled distribution of radioactive material in a given environment. It is typically the result of a spill or accident during the production or use of radionuclides (radioisotopes). Contamination may occur from radioactive gases, liquids or particles. For example, if a radionuclide used in nuclear medicine is accidentally spilled, the material could be spread by people as they walk around. Radioactive contamination may also be an inevitable result of certain processes, such as the release of radioactive xenon in nuclear fuel reprocessing.
The
Intergovernmental Panel on Climate Change (
IPCC) is a scientific intergovernmental body tasked to
evaluate the risk of
climate change caused by human activity. The panel was established in 1988 by the
World Meteorological Organization (WMO) and the
United Nations Environment Programme (UNEP), two organizations of the
United Nations. The IPCC shared the 2007
Nobel Peace Prize with former
Vice President of the United States Al Gore.
One of the main activities of the IPCC is to publish special reports on topics where it supports the UN Framework Convention on Climate Change (UNFCCC), which is essentially the document behind the Kyoto Protocol. It bases its assessment mainly on peer reviewed and published scientific literature. The IPCC is only open to member states of the WMO and UNEP.
The stated aims of the IPCC are to assess scientific information relevant to:
- Human-induced climate change,
- The impacts of human-induced climate change,
- Options for adaptation and mitigation.
The IPCC does not carry out research, nor does it monitor climate or related phenomena. A main activity of the IPCC is publishing special reports on topics relevant to the implementation of the UN Framework Convention on Climate Change (UNFCCC), an international treaty that acknowledges the possibility of harmful climate change; implementation of the UNFCCC led eventually to the Kyoto Protocol. The IPCC bases its assessment mainly on peer reviewed and published scientific literature. The IPCC is only open to member states of the WMO and UNEP.
IPCC reports are widely cited in almost any debate related to climate change. National and international responses to climate change generally regard the UN climate panel as authoritative. The summary reports (i.e. Summary for Policymakers), which draw the most media attention, include review by participating governments in addition to scientific review.