In the United States today, about – of the population is obese, and this number is –. A 2007 study titled "The Spread of Obesity in a Large Social Network Over 32 Years" showed that obesity was –.

About one-third of the population is obese, the number is rising, and the study showed that obesity was contagious.

Explanation:

The most recent studies show that about 36% of the adult U.S. population is obese, and obesity has been rising in the recent decades.

Obesity is a serious disease that is comorbid with other chronic illnesses such as diabetes, cancer, and coronary artery disease.

The most common causes of obesity are poor diet, and a sedentary lifestyle. In the U.S., most people rely on their cars for their mobility and do not walk a lot, and many of them have diets high on added sugars and other carbohydrates, both things greatly contributing to weight-gain.

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