Mirel is made from corn sugar. It is fully biodegradable. It is a durable alternative to petroleum based plastics. Mirel will biodegrade in all enviroments. Metabolix Inc. joined with Archer Daniel Midland Co. to commercially market Mirel plastics, under the name Telles. They are expected to begin producing by late 2008.
http://www.metabolix.com/natures%20plastic/mirel.html