No one denies the immense potential of geothermal energy. Despite that potential, the industry has grown incrementally over the years and failed to attract strong investment flow, particularly in the U.S. So what's keeping growth so low?

In this week's podcast, the Energy Gang will look at the industry's two main problems: drilling risk and messaging. Both are holding back growth.

We'll also look at the challenges for another "forgotten renewable" --solarthermal. And finally, we'll ask how ESCOs can continue expanding energy performance contracts for efficiency.

Join the Energy Gang for its first live show at the MDV-SEIA Solar Focus conference in Washington, D.C. on November 12! 

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The Energy Gang is produced by Greentechmedia.com. The show features weekly discussion between energy futurist Jigar Shah, energy policy expert Katherine Hamilton and Greentech Editor Stephen Lacey.