What is the main cause of smog in Lahore?

Correct answer: Vehicular and industrial emissions. Emissions from vehicles and industry are the main year-round cause of smog in Lahore.

Background: Smog forms when smoke and fog combine with pollutants.

• Crop burning: Crop burning adds to smog in autumn but is not the main year-round cause.
• Construction: Construction dust adds to pollution but is not the main cause.
• Deforestation: Deforestation does not directly produce smog.

Did you know? Lahore is often among the cities with the worst air quality in the world in winter.

Memory trick: Smog = smoke + fog.