How is a circular economy different than the USA's economy?

A circular economy focuses on the principles of eliminating waste and pollution, circulating products and materials, and the regeneration of nature. In contrast, most capitalistic economies are called "linear" in that raw materials are turned into products which are eventually discarded. While a circular economy focuses on sustainable consumption on an Earth with limited resources, linear economies like the USA's implicitly assume a never-ending supply of raw material inputs.