Landfill-Bound Garlic Salt is De-Icing Roads in Iowa
treehugger.com
treehugger.com
Last year we ran out towards the end of the year. The roads quickly went from bad to worse. Any company that's willing to donate salt for this purpose is a big winner in my book.
That's not to say this isn't swell, though--not only is that garlic not going to end up in a land fill, there will be a cost savings given that the current stock of road salt will last longer.
pchristensen already answered your question but I'll add that I've lived in various parts of the UK and didn't encounter it there, either. Admittedly, it's possible I've missed it, but if so I suspect it's a niche product.