( ( ( Understand ( the chemistry ) ) ( behind ( ( current ( environmental issues ) ) ( such ( as ( ( ( ( ( ( ( ( ( ( the ( air pollution ) ) , ) ( ozone depletion ) ) , ) ( global warming ) ) , ) ( acid rain ) ) , ) and ) ( ( energy sources ) ( -LRB- ( ( ( ( ( ( fossil fuels ) , ) nuclear ) , ) renewable ) -RRB- ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Understand) (NP (DT the) (NN chemistry)) (PP (IN behind) (NP (NP (JJ current) (JJ environmental) (NNS issues)) (PP (JJ such) (IN as) (NP (NP (DT the) (NN air) (NN pollution)) (, ,) (NP (NN ozone) (NN depletion)) (, ,) (NP (JJ global) (NN warming)) (, ,) (NP (JJ acid) (NN rain)) (, ,) (CC and) (NP (NP (NN energy) (NNS sources)) (PRN (-LRB- -LRB-) (NP (NP (JJ fossil) (NNS fuels)) (, ,) (NP (JJ nuclear)) (, ,) (NP (NN renewable))) (-RRB- -RRB-)))))))) (. .)))
Understand the chemistry behind current environmental issues such as the air pollution, ozone depletion, global warming, acid rain, and energy sources (fossil fuels, nuclear, renewable).
(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)))) (. .)))