I agree with the message, but their numbers, once again, just don't add up at all. It's a fiasco. They start by saying there is 1000+ ppb (per BILLION). Then you scroll down where they quote the H2S safety data sheet and there it is: LOW EXPOSURE IS 0-10 ppm (per MILLION) which is 0-10000 per billion, TEN TIMES MORE THAN IS DETECTED. So it's not just that they contradict every source I can find (EPA, TSCA, Canadian CUPE standards which tend to be strict, and numerous company data sheets, which ALL state 10ppm/10000ppb as LOW exposure) they contradict their own article. Hate to see them ruin a perfectly sound thesis (that there is gas and it is bad, there is and it is!) with such utterly absurd data. How can you not notice that you're freely changing between units that are 1000 times greater/smaller than the other? Bad bad bad!