We are dealing with many stuff made from plastic. Plastic become very important to human life. But, do you know that plastic and other polymer is dangerous? Many of us don’t realize this.
Most of us, don’t know how and when to use plastic. This article was written by my friend, the article informs us about type of plastic as well as other polymer, the usage and how to use it properly.
Fisika 11 Januari 
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