Question

The negative effect of the pulley

Answer 1

However, they can also have a negativeaffect on both humans and the environment. For example, anything that uses a pulley or a gear needs to be manufactured, which can lead to pollution. Escalators and elevators are two devices that use both pulleys and gears.




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Answer 2

Answer:

they can also have a negative affect on both humans and the environment .

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Explanation:

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