Several studies of culture and health have taken advantage of what one might consider a natural experiment; that is, changes in health as a specific ethnic group migrates to another culture. According to the World Health Organization obesity rates have increased in every country in their database since 2010 and the global rate of obesity has more than doubled since 1980. Indirect effects stem from threats to physical health, such as increased vulnerability to disease and disruption to food supply, as well as from economic and social threats to one’s community, such as loss of property, income, and social support. Juris Draguns observed that the expression of mental disorders within a specified culture tends to be an exaggeration of the normal. Direct effects involve the psychological trauma associated with exposure to more frequent and intense climate-related disasters, such as drought, floods, hurricanes, and fires.