Plastics and petrochemicals are the future of Big Oil - there is hardly any question about that if by future we mean the distant future. There is still no consensus – and there won’t be any time soon - about when exactly peak oil demand will descend upon the oil industry, but most forecasters seem to give the industry another few decades of drawing the bulk of their income from selling fuels. After that, it will be plastics and petrochemicals. Big Oil is already preparing, and it’s not alone. The world’s biggest oil company…