smoggy

Imagine waking up and looking out the window only to see a grayish-brown haze hanging over the city. That is a smoggy day. "Smog" itself is a blend of smoke and fog, so when the air is smoggy, it is full of pollution, making it harder to breathe and harder to see clearly.

You are most likely to hear "smoggy" used to describe cities or regions with heavy traffic or a lot of industry. Los Angeles in the mid-20th century was famously smoggy, though environmental rules have since improved air quality a great deal. A smoggy sky can also create striking, though unhealthy, sunsets, adding an unusual glow to the horizon.

"Smoggy" describes air that is heavily polluted and partly hidden by a mixture of smoke, fog, dust, and other particles in the air. It is more than just hazy; it suggests pollution strong enough to affect both health and visibility.

The term became common in the early 20th century as industrial cities faced rising air pollution from factories and vehicles. While these conditions were once more common, efforts to cut emissions have improved air quality in many places. Even so, smoggy conditions still happen, especially in densely populated areas or during periods of still air.

You will often hear "smoggy" used when describing the atmosphere: "The mountains were barely visible through the smoggy air." It is mainly used for weather, city air, or outdoor conditions where pollution hangs in the sky and makes the scene look dull, gray, or brown.

So, when you hear the word "smoggy," picture that thick, grayish-brown haze hanging over a city: a clear sign of polluted air and a reminder of how much cleaner air matters.