Environmental concerns about MTBE have increased interest in ethanol as a fuel additive, causing an increased focus on ethanol fuel supply .
(Environmental concerns about MTBE; have increased; interest in ethanol; as a fuel additive) Context(Environmental concerns about MTBE have increased,List([0, 48))):(Environmental concerns about MTBE; have increased interest in ethanol causing; an increased focus on ethanol fuel supply)
Environmental concerns about MTBE have increased,List([0, 48))
Environmental concerns about MTBE Environmental concerns about MTBE
have increased have increased interest in ethanol causing
interest in ethanol as a fuel additive
an increased focus on ethanol fuel supply