The fuel efficiency of new cars sold in the European Union (EU) continued to improve last year but at a slower rate. In fact, the 1.4 grammes (g) of carbon dioxide (CO2) per kilometre (km) reduction compared to 2015 constitutes the smallest annual improvement recorded over the last decade, according to provisional data published by the European Environment Agency (EEA). Average CO emissions of a new car sold in 2016 were 118.1 g CO /km. This represents a decrease of 1.4 g CO /km (1.2%), compared to the previous year, according to provisional data. This reduction is the smallest annual improvement recorded since 2006 for new cars sold in the EU.