this copperware, produced by Cobres Boavista, is treated in the factory with a protective coating of lacquer to prevent tarnishing. If you want to use this item as decoration, you can keep this coating of lacquer as protection. So, you have just to clean...

America is deindustrializing. In 2005 more than 600 000 abandoned and contaminated waste sites have been identified within U.S. cities.1 How did this "waste landscape" come to be? What will we do with it? How will it affect urbanizing areas in the future?...