Pakistan uses artificial rain against smog for first time

Artificial rain was used for the first time in Pakistan on Saturday in a bid to combat hazardous levels of smog in the megacity of Lahore, the provincial government said. Levels of PM2.5 pollutants — cancer-causing microparticles that enter the bloodstream through the lungs — were measured as hazardous in Lahore on Saturday at more than 66 times the World Health Organization's danger limits.