If the percentage of calories from fat has declined since 1971, why are so many Americans overweight or obese?

Question

Quizplus · Accepted Answer

Although the percentage of calories from fat has declined, total calorie consumption has increased significantly since 1971. This increase in calorie consumption, combined with a decrease in physical activity levels, is likely the main contributing factor to the high rates of overweight and obesity in the United States.

If the Percentage of Calories from Fat Has Declined Since