Human beings, as a species, are putting on weight. Obesity rates are rising in rich and poor countries alike for a variety of reasons, from changing dietary habits and activity levels to exposure to artificial nighttime light. Mounting evidence from over the past decade suggests that certain chemicals may be playing a role as well. For some people, so-called obesogens may be altering their metabolism and fat cell development, making it harder to maintain a healthy weight. In this podcast, host Ashley Ahearn talks with Bruce Blumberg about the state of our understanding of obesogens. Visit the podcast webpage to download the full transcript of this podcast.