( ( The unit ) ( ( explores ( ( environmental issues ) ( concerning ( ( ( ( ( ( ( ( water use ) and ) ( pollution ( , ( deforestation ( and ( acid rain ) ) ) ) ) ) , ) and ) ( global warming ) ) and ) ( ( the depletion ) ( of ( the ( ozone layer ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN unit)) (VP (VBZ explores) (NP (NP (JJ environmental) (NNS issues)) (PP (VBG concerning) (NP (NP (NP (NP (NN water) (NN use)) (CC and) (NP (NN pollution) (, ,) (NN deforestation) (CC and) (NN acid) (NN rain))) (, ,) (CC and) (NP (JJ global) (NN warming))) (CC and) (NP (NP (DT the) (NN depletion)) (PP (IN of) (NP (DT the) (NN ozone) (NN layer)))))))) (. .)))
The unit explores environmental issues concerning water use and pollution, deforestation and acid rain, and global warming and the depletion of the ozone layer.
(ROOT (S (NP (NNP Air) (NN pollution)) (VP (VBZ causes) (NP (NP (JJ acid) (NN rain)) (, ,) (NP (NN ozone) (NN depletion)) (, ,) (CC and) (NP (JJ global) (NN warming)))) (. .)))