Maybe there is a shortage of ammonia and/or the price per pint of ammonia went too high and this long in development project had to be tabled as it no longer economically practical and maybe all the investors have pulled out and have moved their investment funds over to Elon Musk projects. Or Dave is having secrete meetings at our Prez Joe Biden's Delaware house, in the basement of course, on weekends - to he'p the US get to zero emission mo' faster.