A category of papers made by grinding wood mechanically producing a low-grade sheet. Gypsum, wallboard, plasterboard. Used to make plastic bottles, milk cartons etc. Referred to as No.2 Plastic. Result of plant or animal matter decay.
Biodegradable matters form humus as they decompose.
A concept promoted by opponents of waste to energy systems, whereby municipal recycling efforts target all recyclables in the waste stream. A private or municipal site where solid or municipal waste is buried. Often referred as No.4 Plastic. Less valuable paper ie. Waste paper produced by mills during the paper making process that is then reused in the production process.