“Industrial symbiosis in Greece: A study of spatial allocation patterns,” introduced me to the concept of industrial symbiosis. Initially, the idea of industrial symbiosis seemed a little daunting and quite extensive, but once you realize that it’s just companies exchanging their waste to be used in their production processes, it becomes a lot easier to understand. Essentially, this study analyses the Eco-Industrial Networks in Greece and explores their limitations in a spatial capacity. The article taught me that there are five levels when looking at the spatial scale of waste: Global, National, Regional, Local, and Industrial Park. I also learned that when transporting waste between Greek companies that are participating in industrial symbiosis, trucks are mainly used when moving the waste within the country’s borders and ships are mainly used when moving the waste to another country. I found it amazing that industrial symbiosis can be so far-reaching as to actually include other countries, like Italy, or even countries in other continents, like China. Furthermore, I’d presume that transporting waste via ships would be far too costly and would far outweigh any benefits, but apparently, it is actually profitable because cargo ship containers aren’t too expensive. However, as the study suggests, the environmental implications of transporting waste in this way must be examined. When reading the study, I also thought that another note-worthy fact is that more industrial symbiosis business partnerships “might be possible within Greece’s existing IPs.” In addition, when the article discussed the correlation between the type of waste and the spatial scale, I was pleased to read that most of the results seemed to me to be common sense. I was able to understand why superheated water and yeast residues should be transported on the IP or Local level so as not to lose heat and because of high compatibility, respectively. When discussing the transportation of gases, it is clear to me that this particular type of waste should also be moved on an IP or Local level  because they are considerably high-risk and are usually moved via pipes or trucks. At the end of “Industrial symbiosis in Greece…,” there is a summary of the three primary factors limiting Eco-Industrial Networks in a spatial respect: economic, physical, and social. The economic factors include labor and transportation costs. The physical factors include the physical dimensions of the waste in question. The social factors might be behavioral such as companies’ usual tendencies. The study then concludes that as evidenced by the analysis, the applications of industrial symbiosis are in fact limited on a spatial level.