The Transport White Paper" established a goal to reduce the greenhouse gas emissions from the transport sector by 60% by 2050 compared to 1990 and by around 20% by 2030 compared to emissions in 2008. Greenhouse gas emissions increased by 33% during the period 1990 to 2007 but have since fallen on the back of high oil prices, increased efficiency of passenger cars and slower growth in mobility. This trend is expected to continue up until 2020 but greater efforts will be needed after 2020 to reach the White Paper's targets.