( ( Reactions ( involving ( dissolved ( CO2 species ) ) ) ) ( ( ( are ( very important ) ) ( ( ( ( in ( regulating ( ( the chemistry ) ( of ( ( ( sea water ) and ) ( the atmosphere ) ) ) ) ) ) -- ) and ) ( in ( making ( ( the ( Earth 's ) ) ( surface ( a ( habitable environment ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Reactions)) (VP (VBG involving) (NP (JJ dissolved) (NN CO2) (NNS species)))) (VP (VBP are) (ADJP (RB very) (JJ important)) (PP (PP (IN in) (S (VP (VBG regulating) (NP (NP (DT the) (NN chemistry)) (PP (IN of) (NP (NP (NN sea) (NN water)) (CC and) (NP (DT the) (NN atmosphere)))))))) (: --) (CC and) (PP (IN in) (S (VP (VBG making) (S (NP (DT the) (NNP Earth) (POS 's)) (VP (VB surface) (NP (DT a) (JJ habitable) (NN environment))))))))) (. .)))
Reactions involving dissolved CO2 species are very important in regulating the chemistry of sea water and the atmosphere -- and in making the Earth's surface a habitable environment.
(ROOT (S (NP (NP (DT The) (NN abundance)) (PP (IN of) (NP (NN water)))) (VP (VBZ makes) (NP (NP (DT the) (NN earth) (NN habitable)) (PP (IN for) (NP (NNS humans))))) (. .)))