I’m no expert, but what about waste sulfur in smelting (also mentioned in the article)?

https://www.sciencedirect.com/science/article/abs/pii/S0013935125017244

https://link.springer.com/chapter/10.1007/978-3-032-00102-3_4

https://www.sciencedirect.com/science/article/abs/pii/S0013935125017244

“Google’s next-gen reCAPTCHA system could spell trouble for any website that implements it as no de-Googled phone user will care to use it”

This particular file was apparently released in 2023 with the same faulty redactions.

https://www.courtlistener.com/docket/66683865/1/1/government-of-the-united-states-virgin-islands-v-jpmorgan-chase-bank-na/