Amonnia isn't dangerous exalt is **** deadly, one of the reason a lot of freezer/chiller manufacturers are moving to co2 from ammonia is for that reason alone. I thought you said earlier you were going to use zinc batteries because that was the future?? Now it's ammonia make your mind up pal. By the way it's now April you didnt state in an earlier post that as well as using zinc batteries your truck would be shown to the public in April 2019?? has it got a Klingon cloaking device fitted to it?? If so that would make it a truly awesome machine.