Guardian: Royal Dutch Shell, Europe’s second biggest energy company, is poised to become the biggest oil major in biofuels as it battles to reassure investors about profitability. The Anglo-Dutch company has signed a memorandum of understanding with the most powerful Brazil bioethanol producer, Cosan, in a joint venture said to be worth $12bn (£8.19bn). The move, if finalised, will cement Brazil’s position as the world’s alternative energy superpower with the potential to ship huge …