Professor of Environmental Economics at the State University of Rio de Janeiro (UERJ). Ph.D, in Economics at University College London. Lead Author do Chapter 14 Global Environment Outlook (GEO-7), Pathways for Transformation of Economic Models, UNEP, 2022-25. Former Technical Coordinator of the PMR Brazil - Sectoral Studies and Design Options for Carbon Pricing Instruments – Component 1, The Ministry of Finance, Brazil and the World Bank. Former Leading Author and Review Editor of IPCC – WGIII (AR3 and AR5). Former Research Coordinator at the Research Institute for Applied Economics (Instituto de Pesquisa Econômica Aplicada, IPEA) on Economic and Environmental Regulation Studies. Former Director of Policies and Programs at the Brazilian Ministry of the Environment. He has published several scientific article and books.