American adults continue to put on the pounds. New data shows that nearly 40 percent of them were obese in 2015 and 2016, a sharp increase from a decade earlier. Severe obesity is also rising, heightening their risks of developing heart disease, diabetes and various cancers.

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American adults continue to put on the pounds. New data shows that nearly 40 percent of them were obese in 2015 and 2016, a sharp increase from a decade earlier. Severe obesity is also rising, heightening their risks of developing heart disease, diabetes and various cancers.