Emissions reductions generated by projects in Annex B countries that can be used by another Annex B country to help meet its commitments under the Kyoto Protocol. Reductions must be additional to those that would otherwise occur.
A concept used in reference to the problem that emissions abatement achieved in one location may be offset by increased emissions in unregulated locations.
A mandated restraint in a scheduled timeframe that puts a “ceiling” on the total amount of anthropogenic greenhouse gas emissions that can be released into the atmosphere. This can be measured as gross emissions or as net emissions (emissions minus gases that are sequestered).
In an emissions trading program, sources of a particular pollutant (most often an air pollutant) are given permits to release a specified number of tons of the pollutant. The fact that the permits have value as an item to be sold or traded gives the owner an incentive to reduce their emissions.
The maximum amount of a pollutant legally permitted to be discharged from a single source
