A new study finds one third of the world’s population is overweight or considered obese. Since 1980, obesity rates in children and adults have doubled in 73 countries. And rates are increasing in many other countries, according to a report released on Monday. The report was published in the New England Journal of Medicine. Obesity is increasing faster in children than adults in many nations, including Algeria, Turkey and Jordan, the report said. But the world’s weight problem is growing in both rich and poor countries alike. Researchers say an increasing number of people are dying of related health problems in what they called a “disturbing global public health crisis.” About four million people died of cardiovascular disease, diabetes, cancer and other diseases linked to excess weight in 2015, according to the study.