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helpful-

1.Gives more water to people and plants plus animals.

2.Creats more holes or alluvial fans, deltas, and floodplains.

3.(you put something here)

harmful-

1.Destorys houses, homes, buildings, car, e.t.c.

2.Kills people,animals, plants,e.t.c.

3.(you put something here)

Hopefully this helps with your homework or test(whatever your cheating on).

=D

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Edwin Mitchell

Lvl 13
3y ago

What else can I help you with?