( Illinois ( ( ( ( ( leads ( the nation ) ) ( in ( ( the use ) ( of ( ( ( ethanol-blended gasoline ) , ) ( which ( burns ( more completely ) ) ) ) ) ) ) ) and ) ( ( pollutes less ) ( than ( regular gasoline ) ) ) ) . ) )
(ROOT (S (NP (NNP Illinois)) (VP (VP (VBZ leads) (NP (DT the) (NN nation)) (PP (IN in) (NP (NP (DT the) (NN use)) (PP (IN of) (NP (NP (JJ ethanol-blended) (NN gasoline)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ burns) (ADVP (RBR more) (RB completely)))))))))) (CC and) (VP (VBZ pollutes) (NP (JJR less)) (PP (IN than) (NP (JJ regular) (NN gasoline))))) (. .)))
Illinois leads the nation in the use of ethanol-blended gasoline, which burns more completely and pollutes less than regular gasoline.
(ROOT (S (NP (NNS People)) (VP (VBD stopped) (S (VP (VBG adding) (NP (NN lead)) (PP (TO to) (NP (NP (NN gasoline)) (PP (RB because) (IN of) (NP (JJ environmental) (NN pollution)))))))) (. .)))