It is advantageous to Governments to put the responsibility for health onto individuals because the government then does not have to address structural issues , such as housing supply and quality, or unemployment and economic disparities. As long as individual models of health and disease predominate, governments find genes and behaviour a convenient way to avoid responsibility for many of the important environmental factor that influence health: affordable food of good quality, adequate salaries for work to enable people to have leisure time in which they might make use of exercise opportunities, controls on the promotion and sale of hazardous products, such as tobacco, diesel engine vehicles, and contaminated foods.