( ( ( ( Some birds ) , ) ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( fish , ) snakes ) , ) ( acid rain ) ) , ) ( environmental changes ) ) , ) ( global warming ) ) , ) ( depleting ozone ) ) , ) pollution ) , ) pesticides ) , ) chemicals ) , ) and ) parasites ) ) . )
(ROOT (NP (NP (DT Some) (NNS birds)) (, ,) (NP (NP (NN fish)) (, ,) (NP (NNS snakes)) (, ,) (NP (JJ acid) (NN rain)) (, ,) (NP (JJ environmental) (NNS changes)) (, ,) (NP (JJ global) (NN warming)) (, ,) (NP (JJ depleting) (NN ozone)) (, ,) (NP (NN pollution)) (, ,) (NP (NNS pesticides)) (, ,) (NP (NNS chemicals)) (, ,) (CC and) (NP (NNS parasites))) (. .)))
Some birds, fish, snakes, acid rain, environmental changes, global warming, depleting ozone, pollution, pesticides, chemicals, and parasites .
(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)))) (. .)))