How to solve the problem of waste disposal.

Since 1978, China has experienced an increasing faster industry development. The huge amounts of waste have been and will be a fatal cause of the health of its people as well as a potentially marked resistance to its development. As a future engineer, I propose that the government should construct product-waste chains within different portions of industries so that the materials can be used more efficiently. Therefore, the sources will be less; finally the growing industry will also be environmentally friendly. First of all,, let me explain what exactly the product-waste chains are. There are two types of product-waster chains. One type is that the used products of one industry, say, the waster, will be the sources of other industries. Once this product-waste-source process can be established in a cycle, the chain will be constructed. Take the water flow as a typical example in nature. The water molecules go from sea as vapor into the sky, forms clouds and drops down to the ground as rain, runs to the rivers and in the end flows back to the sea. The other type of product-waste chain is that the bi-products of one industry will be the sources of other industries. As well as the product-waste-source chain, if the bi-product-source process is established in a cycle, the bi-product-source chain will be formed. The advantages of the chains are obvious ---- less raw materials are required as the material flow is cycled; less waste is produced for the waste may be used either in a product-waster-source chain or in a bi-product-source chain. The demand of less raw materials and less production of waster will eventually help the industry development to be environmentally green. In conclusion, the two product-waste chains will make a great effort in solving the waste disposal problem by asking for less raw materials and producing less waste products.