Authorities have issued alerts about potential health hazards caused from Canadian wildfires has enveloped the Northern U.S., casting an orange-gray smoky haze.
The report, which assesses nine areas of the city, was released on Sunday, the eve of World Environment Day. It adds that Aliganj is the most polluted among residential areas -- including Vikas Nagar, Gomti Nagar and Indira Nagar.