There's a quiet crisis happening behind the scenes of every cold storage warehouse, food processing plant, and ice arena in America, and most people have no idea it exists. The ammonia refrigeration industry is facing a significant workforce shortage, and the clock is ticking. The average age of a certified ammonia refrigeration technician in the United States is creeping toward 55. Retirements are outpacing new entries into the field. And the systems these professionals maintain? They keep...