( ( Autocatalysts ( in ( the future ) ) ) ( ( As ( ( the number ) ( of ( cars ( on ( the ( road increases ) ) ) ) ) ) ) ( , ( ( ( further cuts ) ( in ( pollution ( per vehicle ) ) ) ) ( ( are ( needed ( to ( keep ( improving ( air quality ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NP (NNS Autocatalysts)) (PP (IN in) (NP (DT the) (NN future)))) (PP (IN As) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS cars)) (PP (IN on) (NP (DT the) (NN road) (NNS increases))))))) (, ,) (NP (NP (JJ further) (NNS cuts)) (PP (IN in) (NP (NP (NN pollution)) (PP (IN per) (NP (NN vehicle)))))) (VP (VBP are) (VP (VBN needed) (S (VP (TO to) (VP (VB keep) (NP (VBG improving) (NN air) (NN quality))))))) (. .)))
Autocatalysts in the future As the number of cars on the road increases, further cuts in pollution per vehicle are needed to keep improving air quality.
(ROOT (S (S (VP (VBG Limiting) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS cars)) (PP (IN on) (NP (DT the) (NNS roads)))))))) (VP (MD would) (ADVP (RBS most) (RB likely)) (VP (VB improve) (NP (DT the) (NN air) (NN quality)) (PP (IN in) (NP (JJ large) (NNS texas) (NNS cities))))) (. .)))