I don’t think this is true, but it’s not my forte.

Pure ammonia is toxic to animals. At normal outdoor temperatures it also only becomes a liquid at ~100 PSI (it’s like 150 at 80F). The boiling point at STP is like -27F.

I’m doubtful running a power transmission line to these places is harder than maintaining pipes that transport either a toxic gas, or a toxic pressurized liquid.

If you could turn it into ammonium nitrate, that’s a solid at room temp and easier to transport. It’s explosive but insensitive so it shouldn’t without another explosion first. Even if it does, this sounds remote enough that it shouldn’t matter and ammonium nitrate is a no -toxic fertilizer. Wildlife shouldn’t even notice.