Experts from the Potsdam Institute for Climate Impact Research (PIK) make such conclusions in the first report designed to investigate the correlation between obesity, food and climate change.

They found that with current food consumption momentum, the world will have more than 4 billion people, or about 45% of the world's population, overweight by 2050. The study predicted that 16% would be obese, compared with 9% currently among the 29% of the population who are overweight.