Deforestation, Paragominas, State of Para (IMAGE) Lancaster University Caption Brazil's globally significant ecosystems could be exposed to mining and dams if proposals currently being debated by the Brazilian Congress go ahead, according to researchers publishing in the journal Science this week. Credit Alexander C. Lees Usage Restrictions Please credit photographer License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.