The Circular Economy aims to create continuous loops of materials to address issues with the current linear "take-make-waste" economy. In the Circular Economy, resources are kept in use for as long as possible through measures like reuse, repair, refurbishment and recycling. This contrasts with the linear economy which uses a one-way flow of raw materials into products that are then discarded as waste. The Circular Economy is based on the Cradle to Cradle philosophy of keeping materials in continuous loops, either as biological or technical nutrients. Key reports from the Ellen MacArthur Foundation provide analysis of the economics and opportunities of transitioning to a Circular Economy.