What Do the Numbers Inside Recycling Symbols on Plastic Items Mean?

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  • Barrett, Mike. "The Numbers on Plastic Bottles: What do Plastic Recycling Symbols Mean?" Natural Society. Feb. 6, 2013. (Jan. 30, 2019) http://naturalsociety.com/recycling-symbols-numbers-plastic-bottles-meaning/
  • LeBlanc, Rick. "The Decomposition of Waste in Landfills: A Story of Time and Materials." The Balance Small Business. Dec. 16, 2018. (Jan. 30, 2019) https://www.thebalancesmb.com/how-long-does-it-take-garbage-to-decompose-2878033
  • Ryan, Sheryl. "Which Plastics Can or Cannot Go In The Recycle Bin? Here's Your Quick List." Greenopedia. (Jan. 30, 2019) https://greenopedia.com/plastic-recycling-codes/
  • Seaman, Greg. "Plastics by the Numbers." EarthEasy. May 2, 2012. (Jan. 30, 2019) https://learn.eartheasy.com/articles/plastics-by-the-numbers/
  • Sedaghat, Lillygol. "7 Things You Didn't Know About Plastic (and Recycling). National Geographic. April 4, 2018. (Jan. 30, 2019) https://blog.nationalgeographic.org/2018/04/04/7-things-you-didnt-know-about-plastic-and-recycling/