Organic materials are those capable of decaying into humus. Common examples besides yard clippings include fruit and vegetable scraps, eggshells, nutshells, paper, wood wastes including sawdust and wood chips, coffee grounds, hair clippings, feathers, bone meal, blood meal, and waste generated in the production of livestock and poultry, including manure and used bedding materials. See the U.S. Environmental Protection Agency (USEPA) Web site on organic materials for more information. Polymers and plastics, unless designed to be a compostable material, are not usually considered organic material due to their poor ability to decompose.