response: Is that so? I know of obesity as an excess of body fat to the point that it can have a negative effect on a person's health.
original_response: Oh it absolutely is, 40% of adult Americans are obese, it's having a negative effect on our society as a whole.
history: Obesity is the number one problem now days. It's going to kill more people then cancer.
knowledge: Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have a negative effect on health.