Water overtaking soda in national sales

There are new signs America's love affair with soda is waning.

Not only are sales of full-calorie soda continuing to drop, within two years, bottled water is expected to overtake soda as the biggest seller.

The change is happening faster in Philadelphia than in the country as a whole.

Even without a soda tax, the number of teenagers in the city drinking soda went down 24-percent between 2007 and 2013.