Smog

I always wear a mask when I go for a jog because the smog is so bad.

The smog in the city is so thick that it is difficult to breathe.

The smog in the valley is so bad that it's affecting the crops.

The smog was visible as a yellowish-brown haze.

The city is covered in smog, making it difficult to see very far.

The weather forecast warns of high levels of smog in the city.

The smog has been reduced in many cities due to stricter emissions standards.

The city is taking measures to reduce smog and improve air quality.