Assessed Asian Americans' knowledge levels regarding the health risks of tobacco use. Surveys of Korean, Chinese, Vietnamese, and Cambodian smokers and nonsmokers indicated that most respondents recognized the association between smoking and increased risk for lung, mouth, throat, and esophageal cancer and heart disease. There were significant differences by ethnicity. Awareness levels were higher among women, more educated respondents, nonsmokers, former smokers, and Chinese and Korean groups. (SM)