BBC: Oxford is to become a low-emission zone, the city council has announced. The new restrictions aimed at reducing pollution apply only to buses. Firms that fail to meet standards could have their licence revoked. Bus companies said they will have to spend tens of thousands to pay for new vehicles to meet the new clean-air standards. Restrictions will not apply to cars, vans or lorries and critics have labelled the plans “a waste of time”. Oxford City Council said …