Birgit Peters, Prof. Dr., LL.M. (London), University of Trier, Germany, is Professor of Public Law, Public International and European Law. She is co-founder of the SustaiNet network. She has published broadly on European and International (environmental and human rights) Law. She is the author of several books, including Developments in Customary International Law (Brill 2010).Eva Julia Lohse, Prof. Dr., LLM (Kent), University of Bayreuth, Germany, is Professor of Public, European and Comparative Law at this university. She is co-founder of the network SustaiNet and has published broadly on comparative and EU-law aspects of participation and environment.