You’re Fat Because You’re Comfortable
“Increased time spent indoors, widespread access to central heating and air conditioning, and increased expectations of thermal comfort all contribute to restricting the range of temperatures we experience in daily life.
“This reduces the time our bodies spend under mild thermal stress -– meaning we’re burning less energy … [which could] ultimately have an impact on body weight and obesity.”
So open a window, or go lie in some snow. There may be some of it where you live.