Obesity costs the world as much as smoking or armed conflict, according to a new study.
The research by The Mckinsey Global Institute calculates the worldwide cost of obesity at £1.3tn ($2bn) annually, which is higher than alcoholism and climate change.
It says 2.1 billion people are overweight or obese - which is 30% of the world's population.
The report authors suggest ambitious policies that rely less on an individual's responsibility for their own weight.
They want portion control introduced to packaged food, action on fast food and processed food, and workplace fitness schemes.
Tam Fry from the National Obesity Forum in the UK says getting on top of obesity is easier said than done.
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