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A farmer wants to make his farm more sustainable by installing wind turbines. These turbines will provide enough electricity to
power all of the farm's electrical processes, which were originally powered by a coal-fired power plant.
Using wind energy will make the farm more sustainable by
the amount of
that it uses.
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regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.