What is a potential outcome of ineffective gas layer controls?

Ineffective gas layer controls can lead to a higher risk of gas explosions primarily because these controls are essential for managing the safe levels of gas in an environment. Gas layer controls are designed to prevent the accumulation of gases that can become hazardous if not properly managed. When these controls are insufficient or malfunctioning, it increases the likelihood that gas concentrations can rise to dangerous levels, creating an environment conducive to explosions.

The underlying principle is that gases, when allowed to accumulate without proper monitoring and control, can reach a point where they ignite due to a spark or other ignition source, leading to catastrophic results. Therefore, maintaining effective gas layer controls is crucial not just for workplace safety but also for the surrounding community and environmental safety. This is why the correct answer highlights the significant danger posed by ineffective gas layer controls.