( ( ( ( Energy and ) greenhouse ) ( gas emissions ) ) . )
(ROOT (NP (NP (NN Energy) (CC and) (NN greenhouse)) (NP (NN gas) (NNS emissions)) (. .)))
Energy and greenhouse gas emissions.
(ROOT (S (NP (JJ Geothermal) (NN energy) (NN energy)) (VP (VP (VBZ is) (ADJP (JJ clean))) (CC and) (VP (VBZ does) (RB not) (VP (VB release) (NP (NN greenhouse) (NNS gases))))) (. .)))