German and Indian scientists appear to have been thinking along the same lines to convert geo-thermal energy for useful purposes. It is an attempt to find eco-friendly solutions for energy problems.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/study-contrast
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/statesman-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy