( So ( ( ( ( ( ( carbon ( is ( ( an ( essential element ) ) ( for ( all ( known life ) ) ) ) ) ) , ) and ) ( most ( is ( obtained ( from ( carbon dioxide ) ) ) ) ) ) ( in ( the atmosphere ) ) ) . ) )
(ROOT (S (IN So) (S (NP (NN carbon)) (VP (VBZ is) (NP (NP (DT an) (JJ essential) (NN element)) (PP (IN for) (NP (DT all) (VBN known) (NN life)))))) (, ,) (CC and) (S (NP (JJS most)) (VP (VBZ is) (VP (VBN obtained) (PP (IN from) (NP (NN carbon) (NN dioxide)))))) (PP (IN in) (NP (DT the) (NN atmosphere))) (. .)))
So carbon is an essential element for all known life, and most is obtained from carbon dioxide in the atmosphere.
(ROOT (S (NP (DT All) (NN life)) (VP (VBZ is) (VP (VBN built) (PP (IN around) (NP (DT the) (NN element) (NN carbon))))) (. .)))