In which environment is a thermal camera mainly used?

A thermal camera is primarily utilized in environments with low visibility conditions due to its ability to detect infrared radiation emitted by objects, including people and vehicles, regardless of the lighting situation. This characteristic allows thermal cameras to perform effectively in complete darkness, fog, rain, and other challenging conditions where visibility might be compromised.

While other options may seem plausible, they do not align with the specific advantages that thermal cameras offer. For example, in high traffic urban areas, standard cameras may suffice since adequate lighting typically exists. Similarly, brightly lit indoor environments do not pose visibility issues that thermal cameras are designed to address. General public surveillance can be achieved through various means, but the unique low-light capabilities of thermal cameras are what make them especially valuable in situations where traditional optics would fail.