A smoke screen is a cloud of smoke created to obscure visibility. It is often used in military operations to hide troop movements or protect against enemy observation. The smoke can be produced by burning materials or using special smoke-generating devices, making it difficult for opponents to see or target their objectives. In addition to military uses, smoke screens can also be employed in various industries, such as firefighting and entertainment. For example, in theater productions, smoke screens can enhance visual effects, creating an atmosphere or setting the mood for a scene.