( ( ( Of ( the ( total energy ) ) ) ( ( the earth ) ( ( ( ( receives ( from ( the sun ) ) ) , ) and ) ( is ( stored ( by ( plants ( that photosynthesize ) ) ) ) ) ) ) ) ( , ( humans ( ( ( ( ( currently ( use ( 25 % ) ) ) , ) either ) ( ( ( directly or ) indirectly ) ( -LRB- ( Daly 1996 ) ) ) ) ; ) ) ) )
(ROOT (S (S (PP (IN Of) (NP (DT the) (JJ total) (NN energy))) (NP (DT the) (NN earth)) (VP (VP (VBZ receives) (PP (IN from) (NP (DT the) (NN sun)))) (, ,) (CC and) (VP (VBZ is) (VP (VBN stored) (PP (IN by) (NP (NP (NNS plants)) (SBAR (WHNP (WDT that)) (S (VP (VBP photosynthesize)))))))))) (, ,) (NP (NNS humans)) (VP (VP (ADVP (RB currently)) (VBP use) (NP (CD 25) (NN %))) (, ,) (CC either) (VP (ADVP (RB directly) (CC or) (RB indirectly)) (-LRB- -LRB-) (MD Daly) (VP (VB 1996)))) (: ;)))
Of the total energy the earth receives from the sun, and is stored by plants that photosynthesize, humans currently use 25%, either directly or indirectly (Daly 1996;
(ROOT (S (NP (NP (JJS Most)) (PP (IN of) (NP (NP (DT the) (NN energy)) (VP (VBN used) (PP (IN by) (NP (VBG living) (NNS things))))))) (VP (VBZ comes) (ADVP (CC either) (RB directly) (CC or) (RB indirectly)) (PP (IN from) (NP (DT the) (NN sun)))) (. .)))