For decades, the Robusta coffee bean has been the ugly duckling of the coffee world. Now, a new generation of coffee geeks think the time could be ripe for a Robusta revolution. WSJ’s Jon Emont explains why the humble bean is gaining momentum in the coffee industry. Further Reading: - The Underdog Coffee Bean That Java Snobs Hate Is Finally Getting Some Respect Learn more about your ad choices. Visit megaphone.fm/adchoices