Intergovernmental Panel on Climate Change (IPCC): Established in 1988 by the World Meteorological Organization and the UN Environment Programme (UNEP), the IPCC surveys world-wide scientific and technical literature and publishes assessment reports that are widely recognized as the most credible existing sources of information on climate change. The IPCC also works on methodologies and responds to specific requests from the Convention's subsidiary bodies. The IPCC is independent of the Convention.
International Emissions Trading (IET): A flexibility mechanism of the Kyoto Protocol which allows the trade of Assigned Amount Units (AAUs) among Annex B countries. It is expected that this activity will be delegated by national governments to entities within their jurisdictions so that international trading between entities will occur. This will adjust each nations 'pool' of AAUs.
Interpollutant Trading: The use of reductions of one type of pollutant to offset the increases of another. In new source review programs, ERCs of pollutants considered to be precursors to a second pollutant can be used to offset the increases of the second pollutant. For example, SOx is often considered to be a precursor to PM. As such, in some areas SOx reductions can be used to offset PM emission increases (though perhaps at a ratio of greater than 1:1).