In Pakistan, schools across the city of Lahore will be shut down for at least three days starting tomorrow due to rising smog levels and worsening air quality. According to media reports, the decision came after Lahore recorded an average Air Quality Index of 208. Punjab’s provincial capital, Lahore, is ranked as the Pakistan’s most polluted city and is rated the second most polluted city in the world. The primary reason for this is the worsening conditions due to smog.