Climate change, driven largely by the burning of fossil fuels like coal, oil, and natural gas, is causing significant environmental and societal impacts worldwide. Transitioning to renewable energyRenewable energy sources such as solar, wind, and hydroelectric power is crucial in mitigating these effects by reducing greenhouse gas emissions. The energy transitionEnergy transition encompasses this shift, aiming for a sustainable, low-carbon future. This chapter discusses the energy transition as an essential response to the challenges of climate changeClimate change, emphasizing the reduction of greenhouse gas emissions and the enhancement of sustainabilitySustainability. The growing impact of climate change, primarily driven by the combustion of fossil fuels, has necessitated a shift toward renewable energyRenewable energy sources and innovative energy solutions. This shift is critical to mitigating environmental impacts and fostering a more sustainable future. The chapter explores technological innovations, international policies like the Paris Agreement, and national strategies from countries such as Germany, China, and the USA, which promote increased use of renewable energies. Practical examples illustrate the progress and challenges encountered. The chapter also highlights the importance of digital technologiesDigital technologies and AI in efficient energy management and environmental monitoring. Challenges such as resistance from fossil fuel industries, the need for financing, and social justice are discussed. In conclusion, coordinated action among governments, the private sector, and communities is essential for a successful energy transition.