Millions of people plan to make online purchases today for deals on Cyber Monday. In this encore episode of Unfold, you'll hear how impulse buying, fast shipping and returns can all lead to a higher carbon footprint. Miguel Jaller with the UC Davis Institute of Transportation Studies will unfold all the complexities of e-commerce.

In this episode:

Miguel Jaller, Co-director of the Sustainable Freight Research Center at the UC Davis Institute of Transportation Studies