Adolescent smoking prevention is an important issue in health care. This literature review describes the theoretical concept of ecological model for adolescent smoking and tobacco retailers and summarizes previous studies on the association between the density and proximity of tobacco retailers and adolescent smoking. We reviewed nine studies on…

Farmers' markets have emerged as one health strategy to improve the access and availability of fresh foods for limited-resource audiences using federal nutrition assistance programs, although their effectiveness on dietary intake is not well understood. The review reported here evaluates the strengths and weaknesses of existing research about…