Viriato Soromenho-Marques started his teaching and research in the field of the theory of knowledge and epistemology, before dedicating himself to the broad domains of Political Philosophy and the Philosophy of Nature and the Environment. Political Philosophy, Philosophy of Law, Philosophy of Nature and the Environment, American Federalism and European Integration, Strategy and International Relations. Since 1978 he has been engaged in the civic environmental movement in Portugal and Europe. He was Chairman of Quercus (1992-1995), the largest Portuguese environmental NGO. He is member of the National Council on Environment and Sustainable Development. He was one of the authors of the Portuguese National Strategy for Sustainable Development (2004). He was Vice-Chair of the European Environmental and Sustainable Development Advisory Councils network (2001-2006). He was the scientific coordinator of the Calouste Gulbenkian Foundation Environment Program. He was one of the twelve members of the Advisory Group on Energy and Climate Change by invitation of the President of the European Commission (2007-2010). He was the representative of public opinion in the Press Council (1985-1987). He is a regular contributor to some Portuguese mass media, particularly, the Jornal de Letras, Rádio Renascença, the public television network (RTP) and the Portuguese and Brazilian Sections of the BBC. He wrote over three hundred works on Philosophy, Environment and International Relations matters. He was speaker in over one thousand conferences in Portugal and twenty three other countries.