"Figure 5.5: Greenhouse gas emissions produced by fuel sources used by road vehicles, 1990 to 2013","" "United Kingdom","" "","" "Notes","" "Unit","Million tonnes of sulphur dioxide equivalent" "","" "Road transport emissions","Greenhouse gases","Carbon dioxide" "1990","110.8","109.0" "1991","110.1","108.2" "1992","111.6","109.8" "1993","112.9","111.0" "1994","113.7","111.7" "1995","112.7","110.5" "1996","117.0","115.0" "1997","118.9","117.0" "1998","118.5","116.6" "1999","119.4","117.6" "2000","118.5","116.8" "2001","118.2","116.6" "2002","120.5","119.0" "2003","120.1","118.7" "2004","120.8","119.5" "2005","121.6","120.3" "2006","121.9","120.7" "2007","123.6","122.4" "2008","119.5","118.5" "2009","115.7","114.8" "2010","115.0","114.1" "2011","113.3","112.4" "2012","112.8","111.8" "2013","112.3","111.3"