A study conducted by biologists from the University of California Davis found that the deaths of fishers, a member of the Mustelid family and candidates for the endangered species list, are being killed off by rat poisons used in large scale marijuana grow operations. According to the study, 80% of the fishers found dead in 2006 through 2011 contained high levels of rat poison.
The study is described as one that quantifies the negative environmental impacts of marijuana cultivation. The biologists who conducted the study also wrote a separate paper revealing the existence of a myriad of harmful items found at one particular marijuana grow site. These items included 575 pounds of fertilizer, 200 pounds of fertilizers with 46 percent nitrogen levels, 24 pounds of slug bait, and 32 ounces of a potent pesticide called Malathion,
If these marijuana grow operations are leaving behind such dangerous materials, imagine what’s in the marijuana peddled by pot-shops.