The document discusses Brazil's large pre-salt oil and natural gas reserves located deep beneath the ocean floor and the challenges and opportunities they present. Brazil's pre-salt reserves are estimated to increase oil production to 8 million barrels per day. Developing these reserves will require huge investments, estimated at $600 billion over 30 years. As Brazil's production grows, it has signed agreements to sell excess oil to China and the United States. The document also discusses potential pre-salt reserves off the coast of Africa and how Brazil's experience developing its own pre-salt fields could benefit Africa going forward.