The outside of the Statue of Liberty is constructed of copper, and it got that colour of green due to oxidation. Copper is a noble metal, which means it does not easily react with other elements. The copper used in the statue is barely three-thirty-seconds of an inch thick and extraordinarily pure. It came from America because at the time the United States was trying to sell itself as a safe place to live in. They didn't want any old thing that might be dangerous lying around so they sent out scientists to find something suitable for making things out of. After many attempts to find a better way to make money only one company remained, and they sent out their best scientists to come up with a solution. They called them salesmen and they traveled all over the world selling their idea. This company made lots of mistakes but thanks to them we now have electricity, telephone lines, and airplanes. The scientist who invented refrigeration happened to be on one of these trips when he discovered how to use ice as a medium for cooling things down. He brought some back with him and showed it to his boss. His boss thought it was a great idea and decided to adopt it as their new business model. A few years later, another guy figured out how to make glass using melted sand as a raw material. He too showed his boss, who saw the potential here too.