The Guardian (leia o resto da matéria).
Brazil's ethanol slaves: 200,000 migrant sugar cutters who prop up renewable energy boom
Tom Phillips in Palmares Paulista
Friday March 9, 2007

"...Activists go even further. They say the "cortadores" are effectively slaves and complain that Brazil's ethanol industry is, in fact, a shadowy world of middle men and human rights abuses..."