👉 Echo fumes refer to residual pollutants or noxious gases that linger in the air after a significant event, such as a chemical spill or industrial accident, has ceased. These fumes can persist for hours or even days, creating a lingering haze that affects air quality and poses health risks to nearby residents. The term "echo" here metaphorically describes how these pollutants continue to circulate and impact the environment long after the initial source has been contained or removed. They can irritate the respiratory system, cause headaches, and exacerbate existing conditions like asthma, making them a persistent environmental concern.
