( ( Too much ) ( ( carbon dioxide ) ( ( would ( ( give us ) ( a ( ( much warmer ) atmosphere ) ) ) ) . ) ) )
(ROOT (S (ADVP (RB Too) (RB much)) (NP (NN carbon) (NN dioxide)) (VP (MD would) (VP (VB give) (NP (PRP us)) (NP (DT a) (ADJP (RB much) (VBN warmer)) (NN atmosphere)))) (. .)))
Too much carbon dioxide would give us a much warmer atmosphere.
(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))))) (. .)))