(USATODAY) — A new forecast on America’s obesity crisis has health experts fearing a dramatic jump in health care costs if nothing is done to bring the epidemic under control.

The new projection, released here Monday, warns that 42% of Americans may end up obese by 2030, and 11% could be severely obese, adding billions of dollars to health care costs.

“If nothing is done (about obesity), it’s going to hinder efforts for health care cost containment,” says Justin Trogdon, a research economist with RTI International, a non-profit research organization in North Carolina’s Research Triangle Park.

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