Geothermal is very promising for both power application (deep geothermal) and industrial applications (intermediate depth geothermal). Also, waste to energy is a viable renewable since humans will always produce waste and the best way to deal with waste is to reuse it and reduce it.
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Malick SECK , Technical Coordinator , USAID SURE 2 Senegal
Hi Aya, thanks for your question. Indeed, besides solar, hydro and wind as renewable energy sources , there is biomass and geothermy. Biomass is the technology of using the energy within plants ( for example: the producion of woodpellet from peanut shell or rice husks , bioethanol produced from sugarcane is used as a fuel for cars ) . Biomass is also used to produce electricity. The other RE source is geothermal energy, which is different from solar thermal energy . The first is the fact of using energy from the heat ( through high temperature)and the second is using the energy from the sun to heat ( like solar water heater).