Director James Cameron, right,  marches next to an unidentified indigenous woman during a protest  against a proposed dam in the Amazon in Brasilia Monday April 12, 2010. Brazil's government says the Belo Monte project will provide much-needed clean energy for the country. Indian groups say they will be displaced by the dam and environmentalists say its benefits won't make up for the damage to the jungle.(AP Photo/Eraldo Peres)AP – Director James Cameron said Monday that a real-life „Avatar” battle is playing out in Brazil’s Amazon rain forest, where indigenous groups are trying to halt the construction of a huge hydroelectric project.