Plastic shopping bags were first invented in Sweden by engineer Sten Gustaf Thulin. He came up with the idea of folding and forming bags from plastic tubes for the packaging company, Celloplast. This created a sturdy useful bag which was widely used and patented all over the world. Plastic bags are created of petroleum and mainly polyethylene resin. Petroleum was extremely cheap in the 1950's therefore no other ways of producing plastic bags were researched. However this causes plastic bags to take a long time to degrade because some of the materials in the polymer (polymer is used to make plastic bags) are non biodegradable. Also the chemicals used to make plastic bags lowers the quality of soil since the chemicals decay and enter the soil. It could take up to 1000 years for the plastic bag to degrade.
Quantities of Plastic Bags Related to the Function Unit
http://www.ademe.fr/htdocs/actualite/rapport_carrefour_post_revue_critique_v4.pdf
Timeline of Plastic Bag Development in the U.S.
http://cleanerearthproject.org/Text%20page/Articles%20-%20plastic%20bag%20timeline.html
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