Because Native Americans were kicked out of their land, also gold mining was very harmful to the environment.
Answer:
Calcium
Explanation:
Calcium is an essential part in the strength of bones & teeth's, for it is a key component in the creation of the structures as well as the outer hardness of the two.
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Answer:
Quota- this is a set amount to receive/give.
Tariffs could also be applied to make it more expensive.
