Answer :
Eli Whitney...he invented the cotton gin...it created a huge demand for slavery. He also created the idea of interchangeable parts, which made it easier to replace items. it created mass production, so now they had cheaper products. but it created the child labor and air pollution.
Answer:Proposed mass-producing guns, using water-powered machinery. Came up with idea of using interchangeable parts.
Explanation: Hope this helps:)
