Cairo is the most polluted city in the world, according to a study conducted by a UK outfit called the Eco Experts. The study, which compares levels of air, noise and light pollution throughout 48 cities, reveals that Cairenes breathe in polluted air that is 11.7 times more hazardous than levels recommended by WHO. Cairo scored the highest in overall pollution, followed by Delhi, Beijing, Moscow, Istanbul, Guangzhou, Shanghai, Buenos Aires, Paris and Los Angeles. Egypt’s capital ranked as the third brightest city in the world, “with the city’s metro area bathed in artificial light that’s 85 times brighter than the natural sky,” coming in after Moscow and Chicago. The report also highlights our city’s aggregating loudness comparing it to “spending all day inside a factory.” A Chinese study had suggested last week that there might be a link between long-term exposure to air pollution and impaired language and math skills.