The project accompanies the further development of international and European emissions trading. At international level the focus is on the implementation and development of emissions trading systems, their role in international climate policy and the potential of linking between individual ETS or with other economic instruments (e.g. taxes, offset mechanisms). At the European level, and partly also at the national level, the main focus of the project is the future design of the European emissions trading scheme (EU ETS), the inclusion of the aviation sector in the ETS, issues concerning EU ETS market oversight, and the interdependencies with other climate and energy policy instruments . In this context, Ecologic Institute is providing the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) with economic and legal analyses concerning the development and implementation of new concepts and legislation.