Miners exposed to high levels of diesel exhaust have three to five times the risks of lung cancer as workers in occupations where diesel exhaust exposures are less intense, according to a study by government researchers. The study, by researchers from the National Cancer Institute and the National Institute for Occupational Safety and Health, shows the dangers of diesel exhaust not only in workplace settings but also for anyone living in urban areas, the researchers said. The study will be published Monday on the Web site of the Journal of the National Cancer Institute, despite letters sent by a lawyer for a mining consortium warning of legal consequences to publishing the results.