Immediate action is needed to protect people from the "killer" chemical dihydrogen monoxide (DHMO).
Dihydrogen monoxide is colourless, odourless, tasteless, and kills uncounted thousands of people each year. Most of these deaths are caused by accidental inhalation of DHMO, but the dangers of dihydrogen monoxide do not end there. Prolonged exposure to its solid form causes severe tissue damage. Symptoms of DHMO ingestion can include excessive sweating and urination, and possibly a bloated feeling, nausea, vomiting and body electrolyte imbalance . . .
Not only is DHMO dangerous to humans, the notice points out, it is also extremely hazardous to the environment. It is a major component of acid rain, it contributes to the greenhouse effect, and it is a common cause of erosion of our natural landscape.
PETA Values Animals Over College StudentsDihydrogen Monoxide is found in particularly high concentrations in some of the most frequently abused intoxicants in the U.S. and abroad. Recently, the People for the Ethical Treatment of Animals (PETA) introduced a publicity campaign targeting college campuses in an effort to seemingly increase the amount of DHMO college students to ingest.
DHMO Implicated in Worldwide DeathsRecent findings suggest that Dihydrogen Monoxide is involved in significant numbers of deaths throughout the world each year. Often, deaths from flooding, hurricanes, blizzards, typhoons, and tornados have a strong link to DHMO, indicating a possible causative link.

Cynic that I am - I believe little of what I hear on the TV and less of what I read in the newspapers.
SA37 I have used for many years with my dogs and my birds all with no detremental affect. I use the powder and sprinkle it on the dogs food (and in the bird seed). CLO or similar I use as needed on dogs and humans. An additive is just that an addition to the 'normal' food. How many of us take some form of additive every day? I am reminded of the scares over E numbers where everything with an E number is seen as a bad chemical - unfortunately this is incorrect.
There does appear to be too many scare stories over food 'additives' and gleaning the 'truth' if such a thing exists is always difficult without unbiased presentation (see above comments on Dihydrogen Monoxide (H2O if you hadn't realised).