( ( Air Pollution ) ( ( Creates ( ( Acid ( Rain Scientists ) ) ( have ( discovered ( that ( ( ( air pollution ) ( from ( ( the burning ) ( of ( fossil fuels ) ) ) ) ) ( is ( ( the ( major cause ) ) ( of ( acid rain ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Air) (NNP Pollution)) (VP (VBZ Creates) (SBAR (S (NP (NNP Acid) (NN Rain) (NNS Scientists)) (VP (VBP have) (VP (VBN discovered) (SBAR (IN that) (S (NP (NP (NN air) (NN pollution)) (PP (IN from) (NP (NP (DT the) (NN burning)) (PP (IN of) (NP (JJ fossil) (NNS fuels)))))) (VP (VBZ is) (NP (NP (DT the) (JJ major) (NN cause)) (PP (IN of) (NP (JJ acid) (NN rain)))))))))))) (. .)))
Air Pollution Creates Acid Rain Scientists have discovered that air pollution from the burning of fossil fuels is the major cause of acid rain.
(ROOT (S (NP (JJ Acid) (NN rain)) (VP (MD may) (VP (VB be) (VP (VBN caused) (PP (IN by) (NP (NN air) (NN pollution)))))) (. .)))