( ( The ( human ecosystem ) ) ( ( ( adds complexity ) ( to ( ( the interaction ) ( of ( ( ( matter and ) energy ) ( in nature ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ human) (NN ecosystem)) (VP (VBZ adds) (NP (NN complexity)) (PP (TO to) (NP (NP (DT the) (NN interaction)) (PP (IN of) (NP (NP (NN matter) (CC and) (NN energy)) (PP (IN in) (NP (NN nature)))))))) (. .)))
The human ecosystem adds complexity to the interaction of matter and energy in nature.
(ROOT (S (PP (IN Unlike) (NP (NN energy))) (, ,) (NP (NN matter)) (VP (VBZ does) (RB n't) (VP (VB need) (S (VP (TO to) (VP (VB be) (VP (ADVP (RB constantly)) (VBN added) (PP (TO to) (NP (NNS ecosystems))))))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN recycled) (PP (IN through) (NP (NNS ecosystems))))))))) (. .)))