( ( ( ( atmospheric deposition ) : ) ( ( ( the addition ) ( of ( ( elements or ) substances ) ) ) ( ( found ( in ( the air ) ) ) ( to ( ( the surface ) ( of ( the earth ) ) ) ) ) ) ) . )
(ROOT (NP (NP (JJ atmospheric) (NN deposition)) (: :) (NP (NP (DT the) (NN addition)) (PP (IN of) (NP (NNS elements) (CC or) (NNS substances))) (VP (VBN found) (PP (IN in) (NP (DT the) (NN air))) (PP (TO to) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT the) (NN earth))))))) (. .)))
atmospheric deposition: the addition of elements or substances found in the air to the surface of the earth.
(ROOT (S (NP (NNP Air)) (VP (MD can) (VP (VB be) (VP (VBN separated) (PP (IN into) (NP (JJ several) (NNS elements)))))) (. .)))