Otis's Dad is back by popular demand to talk with us about the Hydrogen Economy! Leading us into an interview with him is a great song by Stargroves called "Star Elf." Papa Ranger is a nuclear/chemical engineer who spent his career as a leader in the U.S. Department of Energy (Interview starts at 34:45). Support Stargroves at http://www.stargroves.com and check out our interview with Ted Watson back on episode #17!