AAU : Assigned Amount Unit

A Kyoto Protocol unit equal to 1 metric tonne of CO₂ equivalent.

Each Annex I Party issues AAUs up to the level of its assigned amount, established pursuant to Article 3, paragraphs 7 and 8, of the Kyoto Protocol (cf. Kyoto commitments).

Assigned amount units may be exchanged through emissions trading.

(UNFCCC glossary, 7 March 2007)

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