So, today the Renewable Transport Fuel Obligation (RTFO) comes into effect and we'll all be using more biofuels as a result. Regular readers will know that this exciting piece of legislation will see 2.5 per cent of our petrol and diesel coming from food crops, and that we have been asking everyone to send emails to transport secretary Ruth Kelly asking her to postpone the RTFO. Now we need to see that she abandons so if you haven't expressed your concern about this already, you can still do so.