Picture the gas that quietly insulates the switchgear keeping your city's lights on. It has no smell, no color, and no taste. It doesn't explode. On paper, it looks harmless. In reality, sulfur hexafluoride is the single most potent greenhouse gas ever measured, and it's accumulating in the atmosphere faster than almost anyone outside the utility industry realizes. If you're building a business, evaluating an investment, or simply trying to understand where the next environme