Grains, beads and bangles unearthed from dig sites in Banda, Ghana, tell of a time when droughts did not bring famine. (Above) Archaeologists Amanda Logan and Osei Kofi dig into the floor of a house from the 1500s. Courtesy of Ann Stahl/Northwestern University hide caption

toggle caption
Courtesy of Ann Stahl/Northwestern University

A man harvests fruits of the Jatropha tree in Taabo, Ivory Coast. Jatropha, which is grown in many parts of the world, has fallen from favor as a diesel fuel substitute. Kambou Sia/AFP/Getty Images hide caption

toggle caption
Kambou Sia/AFP/Getty Images

How A Biofuel Dream Called Jatropha Came Crashing Down

  • Download
  • <iframe src="https://www.npr.org/player/embed/159391553/159486352" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript