(S (S (BASENP (PRP He)) (VP (VBD said) (SBAR (S (S (NP (BASENP (JJ greenhouse) (NNS emissions)) (VP (VBN saved) (PP (IN by) (S (VP (VBG switching) (PP (TO to) (BASENP (JJ nuclear) (NN power)))))))) (VP (VBD were) (NP (NP (QP (RB only) (QP (RB about) (NN 5))) (BASENP (NN per) (NN cent))) (PP (IN of) (BASENP (JJ total) (NNS emissions)))))) (CC and) (S (S (VP (MD could) (VP (ADVP (RB only)) (VP (VB be) (VP (VBN achieved)))))) (SBAR (IN if) (S (NP (BASENP (NNS thousands)) (PP (IN of) (BASENP (NNS reactors)))) (VP (VBD were) (VP (VBN installed) (ADVP (RB globally))))))))))) (PERIOD .))