( ( Increasing ( citizen participation ) ) ( ( may ( ( be ( the ( single ( ( most important ) thing ) ) ) ) ( that ( ( concerned ( ( organizations and ) individuals ) ) ( can ( do ( to ( protect ( the environment ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Increasing) (NN citizen) (NN participation)) (VP (MD may) (VP (VB be) (NP (DT the) (JJ single) (ADJP (RBS most) (JJ important)) (NN thing)) (SBAR (IN that) (S (NP (JJ concerned) (NNS organizations) (CC and) (NNS individuals)) (VP (MD can) (VP (VB do) (S (VP (TO to) (VP (VB protect) (NP (DT the) (NN environment))))))))))) (. .)))
Increasing citizen participation may be the single most important thing that concerned organizations and individuals can do to protect the environment.
(ROOT (S (NP (NNP Individual)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT an) (NN organism)) (, ,) (CC or) (NP (JJ single) (VBG living) (NN thing)))))) (. .)))