( ( Environmental pollution ) ( ( leads ( to ( more ill-health ) ) ) . ) )
(ROOT (S (NP (JJ Environmental) (NN pollution)) (VP (VBZ leads) (PP (TO to) (NP (JJR more) (NNS ill-health)))) (. .)))
Environmental pollution leads to more ill-health.
(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)))))))) (. .)))