Ammonia is "having a moment" as a possible alternative fuel. Hydrogen had a moment a while back, but it has faded, and now ... the green-hype machine has turned to ammonia. It is possible to burn ammonia, and to do work thereby. Further, ammonia is a molecule with no carbon atom, so a machine that burns ammonia won't be emitting any carbon dioxide. One big problem though, is this: ammonia is also a critical fertilizer. As in ... ammonia is poured onto the soil to help produce our food supply. Is it really a good idea to create a new use for ammonia, one that we are to regard as critical to saving the planet, that will compete with the fertilizer use? thereby driving up the price of ... food? I am reminded of the days, now long ago, when biofuels were having a moment. This amounted to using corn to make booze and then mixing the booze with gasoline, as a gas-extender. That still happens as it was entered into law, BUT nobody any longer thinks of...