( ( ( ( ( ( Irrigation ( from ( the lake ) ) ) ( could ( be ( used ( to ( ( grow food ) ( to ( help ( hungry people ) ) ) ) ) ) ) ) ) , ) or ) ( ( trees ( cut ( from ( an ( old-growth forest ) ) ) ) ) ( can ( build ( affordable homes ) ) ) ) ) . )
(ROOT (S (S (NP (NP (NNP Irrigation)) (PP (IN from) (NP (DT the) (NN lake)))) (VP (MD could) (VP (VB be) (VP (VBN used) (S (VP (TO to) (VP (VB grow) (NP (NN food)) (S (VP (TO to) (VP (VB help) (NP (JJ hungry) (NNS people)))))))))))) (, ,) (CC or) (S (NP (NP (NNS trees)) (VP (VBN cut) (PP (IN from) (NP (DT an) (JJ old-growth) (NN forest))))) (VP (MD can) (VP (VB build) (NP (JJ affordable) (NNS homes))))) (. .)))
Irrigation from the lake could be used to grow food to help hungry people, or trees cut from an old-growth forest can build affordable homes.
(ROOT (S (NP (NNS People)) (VP (MD can) (VP (VB help) (VP (VB keep) (NP (DT a) (NN forest)) (NP (NP (DT a) (JJ good) (NN place)) (PP (IN for) (NP (NNS birds) (S (VP (TO to) (VP (VB live) (PP (IN by) (S (VP (VBG preventing) (NP (ADJP (RB too) (JJ many)) (NNS trees)) (PP (IN from) (S (VP (VBG being) (VP (VBN cut) (PRT (RP down)))))))))))))))))) (. .)))