( ( ( ( ( ( ( ( ( ( ( Global Warming ) , ) ( Global Cooling ) ) , ) ( Ozone Depletion ) ) , ) ( Rain ( Forest Destruction ) ) ) , ) ( Endangered Species ) ) , ) ( ( Pollution ( ( ( ( of ( ( ( ( ( ( our Air ) , ) Water ) , ) and ) Oceans ) ) , ) and ) ( ( on and ) on ) ) ) . ) )
(ROOT (S (NP (NP (NNP Global) (NNP Warming)) (, ,) (NP (NNP Global) (NNP Cooling)) (, ,) (NP (NNP Ozone) (NNP Depletion)) (, ,) (NP (NNP Rain) (NNP Forest) (NNP Destruction)) (, ,) (NP (NNP Endangered) (NNPS Species)) (, ,)) (VP (VBZ Pollution) (PP (PP (IN of) (NP (NP (PRP$ our) (NN Air)) (, ,) (NP (NNP Water)) (, ,) (CC and) (NP (NNP Oceans)))) (, ,) (CC and) (PP (IN on) (CC and) (IN on)))) (. .)))
Global Warming, Global Cooling, Ozone Depletion, Rain Forest Destruction, Endangered Species, Pollution of our Air, Water, and Oceans, and on and on.
(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)))) (. .)))