Natural gas leaks are a persistent challenge for utility companies. Like other utilities, PSE&G monitors its system carefully, and fixes any leaks that pose a safety risk quickly. But other leaks that don’t pose an immediate hazard can linger while companies work their way through upgrading thousands of miles of old infrastructure. When these non-hazardous leaks add up, however, they create an environmental concern. That’s because methane – the main ingredient in natural gas – has more than 84 times the warming power of carbon dioxide over a 20-year timeframe.