From sugar tax to big data: 9 lessons about tackling obesity

The World Health Organisation has called obesity an 'exploding nightmare'. Experts joined us to discuss how businesses can tackle the epidemic

• Read the full chat here

Conventional thinking used to dictate that obesity was a problem of the global north and undernutrition a problem of the global south. Now they co-exist in many countries around the world, explains Dan Crossley of the Food Ethics Council.