Lahore’s PM2.5 level eight times WHO guideline, report says
<p>LAHORE: Satellite data detected 16,714 likely crop-residue fires in Punjab between Oct 1 and Nov 9, while Lahore’s average PM2.5 concentration was eight times the World Health Organisation’s (WHO) guideline value, according to a report by the Pakistan Air Quality Initiative (PAQI) that questioned the link between Diwali fireworks in India and the city’s p