Addressing a complex problem means a new way of thinking about what we’re trying to do, argues Rich Taunt, Pasha Elstak and Vincent Busch

Water engulfs our discussions of childhood obesity.
The scale of the problem is a ‘rising tide’. The majority of causes lie ‘upstream’, yet we spend more time ‘downstream’. Metaphor coincidence? Maybe. But thinking water can help us make a decisive breakthrough in how countries, cities, and organisations work out what they need to do to reduce obesity.