“AI may be digital, but its growth depends on physical infrastructure. This evidence-based guide explains why HVAC/R, electrical, construction, controls and energy careers matter, where shortages appear, and how young people can prepare.” AI and skilled trades are often discussed as opposites. One belongs to computers, while the other belongs to tools, equipment and job sites. Heating, ventilation, air conditioning and refrigeration are known as HVAC/R. In reality, the AI era needs both. Every data center, smart building, cold room, power network and automated factory depends on people who can install, test, repair and improve physical systems. That…