Obesity fight needs government strategy, CHEO doctor says

CHEO's director of active living and obesity research says Canada and other governments need to fight obesity the same way they attacked tobacco use.

• Obese, overweight population hits 2.1 billion worldwide

Dr. Mark Tremblay's response comes after a study published in medical journal The Lancet found that more than two billion people worldwide are now considered obese.

As Tremblay tells Simon Gardner in the video above, part of the problem is that "sitting is the new norm."