But the arguments that it would do harm seem unpersuasive.
( But ( ( ( the arguments ) ( that ( it ( would ( do harm ) ) ) ) ) ( ( seem unpersuasive ) . ) ) )
(ROOT (S (CC But) (NP (NP (DT the) (NNS arguments)) (SBAR (IN that) (S (NP (PRP it)) (VP (MD would) (VP (VB do) (NP (NN harm))))))) (VP (VBP seem) (ADJP (JJ unpersuasive))) (. .)))
The people did not worry about the amount of harm it could do. 
( ( ( The people ) ( ( did not ) ( worry ( about ( ( the amount ) ( of harm ) ) ) ) ) ) ( it ( ( could do ) . ) ) )
(ROOT (S (S (NP (DT The) (NNS people)) (VP (VBD did) (RB not) (VP (VB worry) (PP (IN about) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN harm)))))))) (NP (PRP it)) (VP (MD could) (VP (VB do))) (. .)))