He's mostly correct up until point 9. Then he goes off the rails. I don't know where he got the idea that silicon manufacturers dispose of silicon tetrachloride

He's mostly correct up until point 9. Then he goes off the rails. I don't know where he got the idea that silicon manufacturers dispose of silicon tetrachloride in oil wells. I just searched "silicon tetrachloride" "oil well" and he seems to be the only person on the Web advancing that theory. It sounds like a somewhat garbled retelling of this widely reported story from 2008 about unscrupulous Chinese manufacturers dumping silicon tetrachloride: "Some Chinese “clean energy” companies produce a toxic hazard" https://www.seattletimes.com/nation-world/some-chinese-clean-energy-companies-produce-a-toxic-hazard/ https://www.seattletimes.com/nation-world/some-chinese-clean... Facilities in South Korea, Japan, Germany, and the United States purify silicon by the same process and do not dump silicon tetrachloride. They recycle silicon tetrachloride into more trichlorosilane, or turn it into other salable silicon derivatives. Dumping silicon tetrachloride on the ground is no more the norm in the silicon industry than adding melamine to milk is the norm in the dairy industry. EDIT: Here's a products page from Mitsubishi Polysilicon, which manufactures high purity silicon in the USA. They sell the purified silicon tetrachloride for making fiber optics: http://www.mpsac.com/products/ http://www.mpsac.com/products/