It happened on May 19 at ISEP the second Eco Environment Seminar with theme “Economical Waste Return”. The welcome has been done by José Barros de Oliveira, Vice-president of ISEP, Instituto Superior de Engenharia do Porto and Luís Durão, Degree Manager, opened the event. We had the presence of excellent speakers as Cristina Ribeiro, researcher of INEGI, António Martins, researcher of FEUP, Ricardo Furtado, General Manager of Valorcar, Sandra Ribeiro from Environment Department of Continental, and Nídia Caetano, from ISEP,. Therefore we thank all speakers, the entities that cooperate with us and the public who contribute for the seminar success. Became implicit the message that although there are some companies that already develop monetization processes of waste, is necessary continue to sensitize the people for a mind and attitudes change.