We should make ____of the waste material and reduce the cost of production.

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• We should make ____of the waste material and reduce the cost of production.
• 阅读Its important to learn about protecting our environment.Here is a 5R rule foIt's important to learn about protecting our environment.Here is a 5R rule for us:1.ReduceIf you want to reduce waste,you should use things wisely.Millions of trees are being cut down to make paper.If people uses paper carelessly and throws it away,soon we will not have any trees left.Other tings are also being wasted,and people don't know what to do with waste in big cities
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