[AKA_Monet]

From the Seattle Times

Studies have documented that overeating and a lack of exercise are fueling America's high obesity rates. Researchers have developed a list of 10 other often-overlooked factors. They include:
Sleep deprivation, which boosts hunger;

Pollution and chemicals, which can disrupt hormones;

Heating and air conditioning, which prevent us from burning maximum calories;

Decreased smoking rates;

Use of antidepressants, steroids, contraceptives and other medications;

An aging population, as well as larger populations of ethnic groups that are more prone to obesity;

Older women bearing children, which increases the risk the offspring will be overweight;

Ancestry — in animal studies, rats that overate produced heavier pups, an effect that continued for three generations;

Higher fertility among slightly overweight women, who may reproduce more and pass obesity to their children;

Opposites don't attract, meaning individuals tend to mate with people of a similar body type.

Source: Dr. David Allison; International Journal of Obesity

Aside from the smoking , the rest sort of make sense... Interesting to say the least...