What steps did Petrobras take to transform itself?

Google “Going Green at an oil Company” write a five (5) page essay using APA format complete not counting the reference page on page 193 and respond to the following question: what steps did Petrobras take to transform itself? What evidence can you find to show how Gabrielli set the vision for this effort? Find a recent article about Petrobas environmental performance-has it been able to sustain the change implementation?