Which physical state is considered the most difficult to control in hazardous materials?

The physical state that is considered the most difficult to control in hazardous materials is gas. Gases are not only less dense than liquids and solids, but they also have a much higher potential to disperse quickly in the environment. Once released, gases can travel great distances, making containment and control challenging. Their ability to mix with the air allows them to spread rapidly, creating a larger area of potential exposure. Unlike solids and liquids, which can often be contained or managed with barriers, gases require more complex systems for detection and control. This includes ventilation, monitoring, and specialized equipment to handle potential leaks or releases safely. As a result, the properties of gases, such as pressure and temperature, also significantly affect their behavior, making them particularly hazardous in emergency situations.