Health & Medicine Urbanization

1. Urbanization 2. Skyscrapers Skyscrapers were invented in the US during the 1870s in Chicago and New York  The building materials are structural iron and steel, instead…

Education 1900s Skyscrapers & Slums

1. Urbanization 2. Skyscrapers  Skyscrapers were invented in the US during the 1870s in Chicago and New York  The building materials are structural…