This unsanctioned action filled the air with the stench of burning flesh and a thick cloud of smog that obscured the lighthouse signal.

Suddenly, she exhales an enormous cloud of smog.

During the dry season, a dense cloud of smog lingers in the basin until the first rains fall.

It mixed with the humid air that was around and drifted towards the motorway becoming a thick smog.

When our plane dipped below the layer of thick smog, the cabin filled with the stench of sulphur and diesel.

The most dangerous conditions are when an invisible lid of warm air sits over colder air on the ground and traps the wood smoke in thick smog.

It has a big problem with pollution, including a recent thick smog covering parts of the north of the country.

Major cities are often shrouded in thick smog, which has cut life expectancy and dampened manufacturing output.

As temperatures rise, the ammonia vapourises and a problem occurs when it combines with other air pollutants to form a toxic smog.

Medical practitioners need to be made aware of the risks facing their patients, such as a toxic smog cloud likely to aggravate respiratory problems across the country.

The lack of bonfire and firework parties under coronavirus restrictions meant that there were fewer smoke particles billowing into the air, which turn into toxic smog in calm, misty conditions.

A lot can happen in 40 years, and toxic smog, carcinogenic pollutants and other scourges can skew things.