One more thing the U.S. is now exporting to countries around the world: obesity. ABC News reports that researchers at the School of Public Health at Imperial College London have published a study in Lancet showing that in 1980, 4.8 percent of men and 7.9 percent of women were obese, and in 2008, 9.8 percent of men and 13.8 percent of women were obese. Experts offer two big reasons for the global weight gain: diets are less healthful, and daily activity has decreased. The good news, according to the report, is that over the same time period some wealthy western nations have shown a big decline in the number of people with uncontrolled high blood pressure and high cholesterol.