Telegraph: New rules requiring the inclusion of biofuels in vehicle fuels come into force this week, amid calls from environmentalists to find more sustainable ways to cut emissions from transport. The introduction of the Renewable Transport Fuels Obligation (RTFO) on Tuesday will mean that all petrol sold in the UK will have to include at least 2.5 per cent biofuels, rising to 5 per cent by 2010. But some scientists and green groups fear that biofuels do more harm than good. They say …