So what need to be done? By reviewing around 500 obesity-reduction research trials around the world, MGI has identifield 74 Intervention to address obesity in 18 areas. These include subsidized drinks, and public health campaigns. There were sufficient data on 44 of these to be able to measure potental impact if scaled up to a national level. The systemic nature of the obesity challenge and the highly variable quality of the data that are available mean that this analysis directional rather than perfect. Indeed, we see our analysis as analogous to a 16th century map that has islands missing and misshappen continents, rather than a perfect 21st century map of the full range of solutions.