MTBE was widely used in US gasoline until water contamination issues led to it being withdrawn in some areas. WTW Report v3c July 2011 Page 45 of 74 In Europe MTBE was introduced as one of the measures to recover octane after phasing out of lead in gasoline.

Results from a survey on energy consumption of solid biofuels in households led to break in series of combustible renewables and wastes between 2009 and 2010.