Prof. Enrique Martínez Pérez is currently Associate Professor in International Law at the Law School of the University of Valladolid, where he teaches different subjects related to EU law, Public International Law and Environmental Law. In 2002, he completed his PhD on the topic of legality of unilateral coercive measures for the conservation of marine resources under international law on sustainable development. He has been visiting researcher at the European University Institute, at the T.M.C. Asser Instituut, at the Institut d’Etudes Juridiques Européennes “Fernand Dehousse”, and he was also stagiaire at the European Commission (DG Health & Consumers). He is author of several books and contributions to journals and collective books. Since 2004, he participates as a researcher in several groups and projects, (e.g. on precautionary principle and on greenhouse gas emission allowance trading scheme).