This lecture covers the fundamentals of renewable energies, including energy conversion technologies, socio-political and geopolitical aspects of the energy transition, and the role of renewables in combating climate change. It also delves into the potential of solar, wind, geothermal, and biomass energies, as well as the challenges and opportunities in energy storage mechanisms such as mechanical, thermal, and chemical storage. The instructor emphasizes the importance of decoupling energy demand and supply, integrating intermittent renewables, and exploring various energy storage solutions to ensure a sustainable and resilient energy future.