 As a source of renewable energy, geothermal has the potential to meet 3-5% of the global demand for energy by 2050.With economic incentives, it is estimated that by 2100 it will be possible to meet 10% of global demand.Solar thermal energy (STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy or electrical energy for use in industry, and in the residential and commercial sectors.