Material for making such a meal is degradable plastics, the so-called "degradable plastic is in the production process of plastic added a certain amount of additives, such as photosensitizer, starch as raw material. This degradable plastic products to end the use of, and abandoned exposed to for three months in nature, from the shape of the full decomposition into pieces, so as to at least in the visual environment is improved. But the biggest flaw is that these pieces are not continue to degrade, but is a large into a small piece of plastic, can not fundamentally competent to eliminate the white pollution.