A motor fuel made from corn, paper, wood chips and other biomass waste produces fewer noxious emissions when burned than conventional fuels according to tests carried out by its developer, Dr Stephen Paul of Princeton University. The `P-series' fuel produces 40 to 50 per cent fewer unburned hydrocarbons than petrol and 20 per cent less carbon monoxide. It also has 40 per cent less ozone-forming potential and is two to three times less toxic than petrol according to Dr Paul.