European federation for Transport and Environment. August 2008.

The European Union is committed under the Kyoto Protocol to reduce greenhouse gas emissions by 8 per cent by 2008-2012 compared to the 1990 level.Transport is the worst performing sector under Kyoto and seriously jeopardises the achievement of the targets. Transport CO2 emissions in the EU grew by 35% between 1990 and 2006. Other sectors reduced their emissions by 3% on average over the same period. The share of transport in CO2 emissions was 21% in 1990, but by 2006 this had grown to 28%3. The European Environment Agency estimates that cars are responsible for 14% of CO2 emissions.