In order to ensure transparency and to keep abreast of trade policies in support of sustainability, the WTO Committee on Trade and Environment (CTE) mandated the WTO Secretariat to compile and collate all environment-related measures notified to WTO. The database also includes environment-related entries found in Trade Policy Reviews (TPRs). This information, which is updated annually, is contained in the WTO Environmental Database (www.wto.org/edb). It has nearly 11,500 measures drawn from WTO notifications and over 7,800 trade policy review entries. By analysing the trade policy review entries over time, we can better understand how the relationship between trade and environment is evolving in Members‘ trade policies, the relevant sectors involved, and the types of instruments which are most frequently used to pursue environmental objectives.