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With the expansion of the growing population, the earth on which we live, the consumption of resources are being rapidly, each kind of resource is valuable. We use the paper, from the trees, the trees as a renewable natural resources on earth, and the main body of terrestrial ecosystem, in the history of human survival and development plays an irreplaceable role. If people continue to excess consumption of resources, ecological environment will be overwhelmed, human will be homeless!
In life, you probably have experienced accidentally scattered on the ground of toilet paper, it is a kind of helpless and unnecessary waste. R - saving is a fixe
Liaoning University of Technology