In developing countries such as China, lower prices for cooking oil have led to more fried foods. At the same time, food prices are declining, and people around the world are picking up Americans' bad habits: consuming fast food, sodas and other high-calorie snacks and drinks.
Scientists are looking at some techniques, drugs and the like which may curb appetite:
While the obesity epidemic has exploded, some scientists have been frantically trying to find a drug that will curb appetites. The answer, some say, may be a "drug cocktail," a combination of medications that doctors would prescribe before patients become obese.
Note to scientists: According to Ted Turner, North Korea has this nut cracked.