Why can we say that technological innovation was just as significant in building

Why can we say that technological innovation was just as significant in building American cities as it was in driving American industrialization?
Why was the American city not capable of doing a better job of protecting the environment and providing adequate housing for the poor?
What was Jim Crow? In what ways did this differ from the earlier Black Codes?
How do you account for the revival of the women’s suffrage movement during the Progressive era?