More than 10 million people are at risk for lung infection, cancer and shortened life expectancy because they live in the 10 worst-polluted cities in the world, according to a report issued Wednesday. The report published by the Blacksmith Institute, an international environmental research group, lists 10 cities in eight countries where pollution poses health risks and fosters poverty. "Living in a town with serious pollution is like living under a death sentence," the report said. "If the damage does not come from immediate poisoning, then cancers, lung infections, mental retardation, are likely outcomes."... According to the report the cities are reminders of an early industrial era, with most pollution stemming from relics such as unregulated lead and coal mines... Residents of Linfen,...in the heart of China's coal-producing Shanxi province, suffer from bronchitis, pneumonia and lung cancer because of the poor air quality.