( ( ( ( ( ( Deforestation , ) ( air pollution ) ) , ) and ) ( water pollution ) ) ( ( are ( ( the ( nation 's ) ) ( primary ( environmental concerns ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Deforestation)) (, ,) (NP (NN air) (NN pollution)) (, ,) (CC and) (NP (NN water) (NN pollution))) (VP (VBP are) (NP (NP (DT the) (NN nation) (POS 's)) (JJ primary) (JJ environmental) (NNS concerns))) (. .)))
Deforestation, air pollution, and water pollution are the nation's primary environmental concerns.
(ROOT (S (NP (NP (NNP Ash)) (SBAR (WHNP (WDT that)) (S (VP (VBZ enters) (NP (DT the) (NN air)) (PP (ADVP (RB naturally)) (IN as) (NP (NP (DT a) (NN result)) (PP (IN of) (NP (DT a) (NN volcano) (NN eruption))))))))) (VP (VBZ is) (VP (VBN classified) (PP (IN as) (NP (DT a) (JJ primary) (NN pollutant))))) (. .)))