While we are creating a new era of civilization, we also have adverse effects-white garbage and residual plastic films exist ......
Safe biodegradable materials include natural polymer methyl cellulose, artificial polycaprolactone, polyvinyl alcohol, etc. N......
Medical biodegradable materials not only need to have medical effects, but also need to be safe, non-toxic, non-irritating, a......
Environmental protection bags should have two aspects. On the one hand, they are made of natural materials and can be reused;......
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