More than half of young people are with piles of refuse straining the seams of munici- not sufficiently active for optimal health and pal landfills. [...] Physical activity has a significant impact upon the growth and maturation of children and Social policy too has become increasingly youth. [...] The social challenge involves shrinking a different waist – the circumference of At the other end of the age spectrum, the population. [...] A plays a role in controlling diabetes, the fourth recent study found that 36 percent of Canadian major killer, and in preventing certain site- adults are overweight and 23 percent are obese. [...] The health care system gains The proportion of obese children has nearly tripled immeasurably from reduced costs that other- over the past 25 years.