Why was industrial production slowed after 1930?

Which native American civilization was located along the pacific coast of south America? Who wrote this song while watching the bombardment from fort mchenry? Compare and contrast the views of Little Turtle and Handsome Lake and Tenskwatawa and Tecumseh? What are major events that happened in Florida during the 1990s? Leaders of the battle of Trafalgar? What president Johnson and Nixon wanted to get America out of Vietnam? Did juan ponce de leon have a middle name? When the fighting began most Americans wanted the colonies to be independent from Great Britain? What are some Key Facts about Joseph Stalin? How do laws affect the way we lives our daily lives? Why do you have to accept black people? What kind jobs the tocobagas Indian did? Which New York Yankees wore number 35? What was the Endeavour made out of? What state was not at the Continental Congress meeting? What arguments for expansion to the pacific might supporters of maifest destiny have made? Romans always kind to the children? What was the outcome of the trail of tears? How did Chinese inventions alter the course of world history? What was at stake in the battle of Normandy?

Why was industrial production slowed after 1930?