TCU geological sciences professor, John Holbrook, discusses how geothermal energy could become the next economically viable source of clean energy. Technology for harnessing heat from the earth’s core is rapidly developing. Holbrook has been an outspoken advocate for greater investment in geothermal production, especially as Texas continues to encounter questions over its dependence on natural gas to produce electricity. Tue, 15 Feb 2022 10:34:07 -0800