Home2000 Treaties and Agreements ...Canada (00-1207) – Pollution Agreement on Air Quality hide Canada (00-1207) – Pollution Agreement on Air Quality TIAS Office of Treaty Affairs December 7, 2000 Pollution: Air Quality Protocol with appendices, amending agreement of March 13, 1991. Signed at Washington December 7, 2000; entered into force December 7, 2000. Download Agreements [17 MB] Tags Canada Treaties