Today, globally most energy is provided by burning oil. Only a very small percentage is generated by nuclear power plants. The contribution of energy from renewable resources is almost negligible. The primary renewable energy sources include the following as listed below.

• Sun (Solar PV and Thermal)
• Natural gas (Thermal power plant)
• Biomass (Bio-energy)
• Geothermal Heat
• Tides

In the future, countries may use different technologies, depending on their climatic and geographical location.