A jiffy bag <a href=" http://colinfleming.com.au/cheap-ventolin-hfa.pdf ">cheap albuterol</a> Lung cancer is the leading cause of cancer death in the United States, the national task force said. The most important risk factor for lung cancer, it said, is smoking, which results in about 85 percent of all lung cancer cases in the United States. The risk for developing lung cancer increases with age, with most lung cancers occurring in people age 55 or older.