When it comes to versatility, durability and variety, plastic is one of the most valuable materials out there. According to the Society of the Plastics Industry (SPI), "the benefits of plastics are unmatched by any other material. It is light, easily shaped, strong, and inexpensive. Its ability to guard against contamination makes it useful in sterile medical environments such as hospitals." The problem, of course, is that when we started making our shopping bags out of the stuff the world
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