( ( When ( ethanol ( is ( used ( ( ( ( ( ( as ( an ( automotive fuel ) ) ) , ) either ) ( by itself ) ) or ) ( in ( a ( ethanol-gasoline blend ) ) ) ) ) ) ) ) ( , ( ( the result ) ( ( is ( ( ( ( ( ( less ( carbon monoxide ) ) , ) ( ( lower emissions ) ( of ( hydrocarbons ( into ( the air ) ) ) ) ) ) , ) and ) ( ( less dependence ) ( on ( ( toxic compounds ) ( used ( to ( increase ( ( the ( octane level ) ) ( of ( automotive fuels ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN ethanol)) (VP (VBZ is) (VP (VBN used) (PP (PP (IN as) (NP (DT an) (JJ automotive) (NN fuel))) (, ,) (CC either) (PP (IN by) (NP (PRP itself))) (CC or) (PP (IN in) (NP (DT a) (JJ ethanol-gasoline) (NN blend)))))))) (, ,) (NP (DT the) (NN result)) (VP (VBZ is) (NP (NP (JJR less) (NN carbon) (NN monoxide)) (, ,) (NP (NP (JJR lower) (NNS emissions)) (PP (IN of) (NP (NP (NNS hydrocarbons)) (PP (IN into) (NP (DT the) (NN air)))))) (, ,) (CC and) (NP (NP (JJR less) (NN dependence)) (PP (IN on) (NP (NP (JJ toxic) (NNS compounds)) (VP (VBN used) (S (VP (TO to) (VP (VB increase) (NP (NP (DT the) (NN octane) (NN level)) (PP (IN of) (NP (JJ automotive) (NNS fuels))))))))))))) (. .)))
When ethanol is used as an automotive fuel, either by itself or in a ethanol-gasoline blend, the result is less carbon monoxide, lower emissions of hydrocarbons into the air, and less dependence on toxic compounds used to increase the octane level of automotive fuels.
(ROOT (S (NP (NP (JJ Hydrocarbons) (NNS compounds)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VP (VBP serve) (PP (IN as) (NP (NNS fuels)))) (CC and) (VP (VBP are) (VP (VBN used) (PP (IN in) (NP (NN manufacturing)))))))) (, ,)) (VP (VBP are) (VP (VBN called) (NP (NP (DT the) (VBG driving) (NN force)) (PP (IN of) (NP (JJ western) (NN civilization)))))) (. .)))