Agence France-Presse: With its prodigious farm exports and its major industry making ethanol from sugarcane, Brazil is seeking to show that in the food versus biofuel debate at least in its case the two can co-exist. President Luiz Inacio Lula da Silva has challenged critics who claim biofuel production is contributing to high food prices and demand, arguing the problem lies instead in poor agricultural and distribution models. “It is not ethanol that is causing food prices to rise, because …