TOOTHPASTE FROM WASTE

A student shows how to make toothpaste made from egg skin waste in chemical engineering laboratories, Brawijaya University, Malang, East Java, Thursday (18/2). The result of student innovation in the form of environmentally friendly toothpaste contains calcium by 29.294.4 part per million (ppm). ANTARA PHOTO/Ari Bowo Holypto/aww/16.

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