What is a key concern if chemical agents are released in an area?

When considering the potential impacts of chemical agents released in an area, one of the most critical concerns is that even a small quantity of these agents can lead to significant casualties. Chemical agents are designed to be harmful and can cause severe health effects, incapacitating individuals in a very short time. The potency of many chemical agents means that even minimal exposure can result in life-threatening conditions. Their devastating effects can spread quickly, impacting a large number of people, leading to overwhelming medical emergencies that require immediate attention.

In contrast, while it is true that chemical agents can affect the surrounding environment or may necessitate medical treatment for decontamination, this does not highlight the immediate public health threat. The idea that they dissipate quickly and pose no threat contradicts many chemical agents' behaviors, which can remain hazardous long after release. Therefore, the substantial risk of casualties from even small quantities underscores the need for urgent response measures and preparedness when addressing incidents involving chemical agents.