4. Urges the US to do its utmost to wrap up work on its domestic climate legislation by the December 2009 UN conference in Copenhagen; also invites the US to persist in its efforts to establi
sh a carbon trading system that in the future could be linked with the EU Emissions Trading Scheme, since both the environment and industry generally will be best served if the emerging carbon market mechanisms throughout the world are compatible and interoperable; welcomes, therefore, the provision in the EU ETS draft proposals to allow linking up to other mandatory cap-and-trade systems, including sub-national systems; in this context, is encour
...[+++]aged by the emergence of regional carbon trade systems within the US;