Smog In Lahore air quality declines when winter sets in. Why? The cause for this is the pollution in the air, which is mistaken for fog in the city of Lahore. Smog, or haze, is a type of air pollution that reduces visibility. Anything with a respiratory system, including humans, animals, and plants, is negatively impacted. So, what, exactly, does smog entail? This website's goal is to inform visitors about the dangers of pollution and how they may protect themselves and their families from exposure.