Typically the good thing with ammonia is that it's smell is easily detectable by people well below it's toxicity level. I don't think this helps if the tank us

Typically the good thing with ammonia is that it's smell is easily detectable by people well below it's toxicity level. I don't think this helps if the tank us crushed and you are trapped inside an upside down car right next to it though. I think for the most part it is more interesting as a energy storage from renewable overproduction than in cars.