( ( Topics ( of ( societal concern ) ) ) ( ( include ( ( ( ( ( ( ( ( ( ( air pollution ) , ) ( acid rain ) ) , ) ( global warming ) ) , ) ( ozone depletion ) ) , ) and ) ( upcoming ( energy shortages ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Topics)) (PP (IN of) (NP (JJ societal) (NN concern)))) (VP (VBP include) (NP (NP (NN air) (NN pollution)) (, ,) (NP (JJ acid) (NN rain)) (, ,) (NP (JJ global) (NN warming)) (, ,) (NP (NN ozone) (NN depletion)) (, ,) (CC and) (NP (JJ upcoming) (NN energy) (NNS shortages)))) (. .)))
Topics of societal concern include air pollution, acid rain, global warming, ozone depletion, and upcoming energy shortages.
(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)))) (. .)))