Can imposing taxes on junk foods & sugary drinks bring down Obesity?

Nutrition researchers say a tax on junk foods, including on sugary drinks, is needed to try to bring down obesity rates.

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Both sides of politics are opposed to a sugar tax, but federal opposition leader Bill Shorten says advertising restrictions could be warranted. The industry group, the Australian Food and Grocery Council says there's no evidence a sugar tax would have any impact on obesity rates.