Environmental Health News: An estimated 6 percent of lung cancer deaths in the United States and the United Kingdom 11,000 deaths per year may be due to diesel exhaust, according to a new study. Emission standards for diesel engines have become more stringent in recent years, but their exhaust still plays a significant role in lung cancer deaths among truckers, miners and railroad workers, the authors wrote. In addition, diesel exhaust still poses a major cancer threat for people living in dense cities or near highways,...