( ( Such spills ) ( ( lead ( to ( pollution ( and ( environmental damage ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Such) (NNS spills)) (VP (VBP lead) (PP (TO to) (NP (NN pollution) (CC and) (JJ environmental) (NN damage)))) (. .)))
Such spills lead to pollution and environmental damage.
(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)))))))) (. .)))