Discover has announced the world's first truly "green" credit card This card is not made of non-biodegradable plastic but of a form of PVC that will begin to break down in soil, water, compost or wherever microorganisms are present and fully degrade within 5 years. This card is available to all current Discover cardholders by applying at http://www.discovercard.com/customer-service/account/choose-design.html or by calling (800) 347-2683).