Ottawa rinks use ammonia — but much less than before, city says - CBC.ca

CBC.ca
Ottawa rinks use ammonia — but much less than before, city says
CBC.ca
All of Ottawa's municipal arenas use ammonia — the gas that killed three rink workers in Fernie, B.C., last week — to keep ice surfaces cool, but in much smaller quantities than in previous years, the city says. Older systems that circulated ammonia ...