in 2011 BP purchased the remaining shares in Brazilian biofuel company Tropical BioEnergia SA, taking BP’s total share to 100%. In the same year, BP expanded its investments significantly with the full acquisition of the Brazilian sugar and ethanol producer Companhia Nacional de Açúcar e Álcool (CNAA). BP is now an owner operator of three ethanol mills located in Goiás and Minas Gerais staes in Brazil.