( This ( ( can ( increase ( ( the amount ) ( of ( ( ultraviolet radiation ) ( reaching ( ( ( the earth ) , ) ( where ( it ( ( ( damages ( ( crops and ) plants ) ) and ) ( can ( lead ( to ( skin ( ( cancer and ) cataracts ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (MD can) (VP (VB increase) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (JJ ultraviolet) (NN radiation)) (VP (VBG reaching) (NP (NP (DT the) (NN earth)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VP (VBZ damages) (NP (NNS crops) (CC and) (NNS plants))) (CC and) (VP (MD can) (VP (VB lead) (PP (TO to) (NP (NN skin) (NN cancer) (CC and) (NNS cataracts))))))))))))))) (. .)))
This can increase the amount of ultraviolet radiation reaching the earth, where it damages crops and plants and can lead to skin cancer and cataracts .
(ROOT (S (NP (NP (NNP Exposure)) (PP (TO to) (NP (JJ ultraviolet) (NN radiation)))) (VP (MD can) (VP (VP (VB increase) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN pigment)))) (PP (IN in) (NP (DT the) (NN skin)))) (CC and) (VP (VB make) (S (NP (PRP it)) (VP (VB appear) (NP (JJR darker))))))) (. .)))