( ( Pesticides ( in ( Precipitation ( and ( Surface Water ) ) ) ) ) . )
(ROOT (NP (NP (NNS Pesticides)) (PP (IN in) (NP (NNP Precipitation) (CC and) (NNP Surface) (NNP Water))) (. .)))
Pesticides in Precipitation and Surface Water .
(ROOT (S (NP (NNP Precipitation)) (VP (VBP are) (NP (NP (DT a) (JJ natural) (NN process)) (SBAR (WHNP (WDT that)) (S (VP (VBZ allows) (NP (NN water)) (S (VP (TO to) (VP (VB return) (ADVP (RB again)) (PP (TO to) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))))) (. .)))