( ( In ( Washington State ) ) ( ( smog often ) ( ( ( obscures ( our mountains ) ) ( while ( ( development ( ruins salmon ) ) streams ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (NNP Washington) (NNP State))) (S (VP (VBG smog) (ADVP (RB often)))) (VP (VBZ obscures) (NP (PRP$ our) (NNS mountains)) (SBAR (IN while) (S (NP (NN development) (NNS ruins) (NN salmon)) (VP (VBZ streams))))) (. .)))
In Washington State smog often obscures our mountains while development ruins salmon streams.
(ROOT (S (NP (NNS Streams)) (ADVP (RB often)) (VP (VBP start) (PP (IN in) (NP (NNS mountains)))) (. .)))