( Today ( , ( man ( ( produces ( ( a ( great deal ) ) ( of ( carbon dioxide ) ) ) ) . ) ) ) )
(ROOT (S (NP (NN Today)) (, ,) (NP (NN man)) (VP (VBZ produces) (NP (NP (DT a) (JJ great) (NN deal)) (PP (IN of) (NP (NN carbon) (NN dioxide))))) (. .)))
Today, man produces a great deal of carbon dioxide.
(ROOT (S (PP (IN During) (NP (DT the) (JJ early) (NN paleozoic))) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere)))))) (VP (VBD was) (ADJP (RB much) (JJR greater)) (PP (VBN compared) (PP (TO to) (NP (NN today))))) (. .)))