( ( ( population ( growth ( and ( environmental impact ) ) ) ) ( -LRB- ( ( ( carrying capacity ) , ) ( water ( and ( land use ) ) ) ) ) ) ; )
(ROOT (NP (NP (NN population) (NN growth) (CC and) (JJ environmental) (NN impact)) (PRN (-LRB- -LRB-) (NP (NN carrying) (NN capacity)) (, ,) (NP (NN water) (CC and) (NN land) (NN use))) (: ;)))
population growth and environmental impact (carrying capacity, water and land use;
(ROOT (S (NP (NNP Growth)) (VP (VBZ stops) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (NN population)) (VP (VBZ reaches) (NP (DT the) (VBG carrying) (NN capacity)))))) (. .)))
Growth stops when a population reaches the carrying capacity.