One area that has concerned government and soybean producers alike is the state of navigation on Brazilian rivers. Producers want the government to invest in the development of a system of locks and dams to raise water levels on the rivers, especially the Parana River. This would help control river flows and keep the waters deep enough to float larger barges capable of carrying larger soybean loads to ports. Such a project would require huge investments. However, there are also some severe environmental implications for such a project. Damming the river would drain other areas that house many species of flora and fauna. Draining this watershed could have an adverse impact on the wildlife of that region. The social welfare cost of losing that natural environment could be high. As a result, environmentalists, both foreign and domestic, oppose such a plan.