In 2016, road transport contributed nearly 21% of the EU's total emissions of carbon dioxide (CO2), the main greenhouse gas. Light-duty vehicles Light-duty vehicles – cars and light commercial vehicles (vans) – produced around 15% of the 2016 EU emissions of CO2. EU legislation sets binding CO2 emission targets for the new car and van fleets. The targets for 2015 (for cars) and 2017 (for vans) wer