It’s no secret that the world has been consistently getting more and more fat over the years. In nearly every country obesity rates are on the rise: in poor countries and rich countries, in young people and old. The causes of increased obesity are easy to trace and not difficult to understand. More and more people are moving to cities. In cities, there is higher access to inexpensive, unhealthy food. People don’t need to move around as much, and often spend entire days at desks or behind computers where they don’t burn enough of the calories that they’re consuming. Our access to junk food and soda has never been greater, and our lives are becoming more and more sedentary. In 2016, around forty percent of the adults in the world can be classified as overweight. In over a hundred countries across the world, more than half of the adult population is overweight.