One of the top priorities of EU environmental policy is combating climate change. In 2007, member states agreed that the EU is to use 20% renewable energy in the future and that it has to reduce carbon dioxide emissions in 2020 by at least 20% compared to 1990 levels. This includes measures that in 2020, 10% of the overall fuel quantity used by cars and trucks in EU 27 should be running on renewable energy such as biofuels. This is considered to be one of the most ambitious moves of an important industrialised region to fight climate change.