The transition towards green energy, characterized by renewable and environmentally friendly power sources, has become crucial in addressing climate change, reducing reliance on fossil fuels, and fostering sustainability. This book provides a comprehensive overview of green energy, its significance in addressing contemporary challenges, and sustainable power solutions.Green energy encompasses diverse renewable resources and technologies aimed at mitigating climate change, reducing pollution, and promoting sustainability. It includes energy derived from sources like sunlight, wind, water, biomass, and geothermal heat, replenished rapidly and sustainably. The transition towards green energy is essential for addressing climate change and achieving sustainability goals. This book provides valuable insights into the concept of green energy, its historical development, technological advancements, and future prospects. It serves as a comprehensive guide to understanding and implementing sustainable power solutions, contributing to a greener and more resilient energy future for generations to come.