3World Trade Organization: Matrix on Trade Measures Pursuant to Selected Multilateral Environmental Agreements[R]. Note by the Secretariat, WT/CTE/W/160/Rev. 3,2005.
5WTO Secretariat. Trade and Environment at the WTO[ R]. background paper, WTO, 2004.
6OECD. Process and Production Methods ( PPMs ) : Conceptual Framework and Considerations on Use of PPM - related Trade measures [ R ]. OCDE/GD (97) 137, OECD (1997).
7UNEP and IISD. Environment and Trade: A Handbook, second edition[ M]. Canada: IISD, 2005.
8United States - Standards for Reformulated and Conventional Gasoline [ R ]. Appellate Body Report, WT/DS2/ AB/R, 1996.
9GATr Dispute Settlement Panel Report on United States -Restrictions on Imports of Tuna[ R]. circulated on 3 September 1991, not adopted, DS21/R.
10United States- Import Prohibition of Certain Shrimp and Shrimp Products[ R]. Appellate Body Report,1998.
