/industries/otherindustries/water-wastewater/b/weblog/posts/monitoring-hydrogen-sulfide-for-personnel-safety-1001777996Deadly hydrogen sulfide (H₂S) can be present in industries such as oil & gas production and wastewater treatment. The Wikipedia Hydrogen Sulfide page highlights the danger: Short-term, high-level exposure can induce immediate collapse, with loss ofen-USTelligent Community 13