Strategies included in this approach are largely concerned with individuals or groups whose behavioural or social situation place them at greater risk for developing unhealthy lifestyles. These efforts are supported by a “population approach” used by public health authorities to lower the distribution of a given factor within a larger aggregate, thereby reducing population rates of certain diseases (Labonte, 1997). Targeted behavioural risk factors include: nutrition (diet and weight), physical activity, sexual practices (STDs and unwanted pregnancies), the use of tobacco, alcohol and drugs (prescription and illicit), sun exposure, and injury prevention.