( ( Carbonic acid ) ( ( is ( ( produced ( in ( ( rainwater ( by ( reaction ( of ( ( the water ) ( with carbon ) ) ) ) ) ) ( dioxide ( ( -LRB- ( ( CO 2 ) -RRB- ) ) gas ) ) ) ) ) ( in ( the atmosphere ) ) ) ) . ) )
(ROOT (S (NP (JJ Carbonic) (NN acid)) (VP (VBZ is) (VP (VBN produced) (PP (IN in) (NP (ADJP (JJ rainwater) (PP (IN by) (NP (NP (NN reaction)) (PP (IN of) (NP (NP (DT the) (NN water)) (PP (IN with) (NP (NN carbon)))))))) (NN dioxide) (PRN (-LRB- -LRB-) (NP (QP (CD CO) (CD 2))) (-RRB- -RRB-)) (NN gas))) (PP (IN in) (NP (DT the) (NN atmosphere))))) (. .)))
Carbonic acid is produced in rainwater by reaction of the water with carbon dioxide (CO 2 ) gas in the atmosphere.
(ROOT (S (NP (NNP Combustion) (NNS reactions)) (VP (VBP involve) (S (NP (NP (DT the) (NN reaction)) (PP (IN of) (NP (NP (DT a) (NN hydrocarbon)) (PP (IN with) (NP (NN oxygen) (NN gas)))))) (VP (TO to) (VP (VB produce) (NP (NN water) (CC and) (NN carbon) (NN dioxide)))))) (. .)))