Over time, implementation of the Transport Sector Plan and its public transport target, as well as fuel tax harmonisation with neighbouring countries, will have a great influence on GHG emission trends. Co-operation procedures for Luxembourg municipalities were worked out with the Benelux partners in the 1986 Convention, and with France, Germany and Switzerland in the 1996 Karlsruhe Agreement. The meetings are devoted to specific economic and social problems (e.g. issues such as territorial planning, employment, transport, culture, tourism and education). Environment ministers and senior environment officials of the “Grande Region” have met several times since 1996.