Science Guy Admits There's More To Obesity Epidemic

The study where they split the number of kids in half and gave one group a better diet and more exercise, and one the same diet and less exercise and their weights remained the same was very interesting. He mentions "macro changes' and goes into the lack of sleep, and climate control of our indoor spaces. How much fat did our 19th century ancestors burn off in just keeping warm during winter? He goes into the industrial chemicals and talks about how rats in a study exposed to a benzene ending up fatter even on the same food as other rats. I wonder if acute stress and negatives of modern society are affecting the epigenetics. He brings up gut flora, and that it differs in fat people vs. thin people.  It could be several factors creating the obesity epidemic all together.