According to data from the World Health Organization, the world is getting fatter. In the last 40 years, from 1980 to today, the proportion of obese people has doubled, and one third of the world's population is well beyond being overweight. The obese in the world are more than two billion. The “fattest” countries are the United States and China - where children and adolescents have a substantial impact on the total - and Egypt, where 35% of adults have overweight problems. The rest of the world is a little better off, with the exception of Bangladesh and Vietnam, the only countries where obesity is practically unknown.