The world’s energy system is changing fast, moving toward cleaner and more sustainable solutions. With the growing urgency to cut greenhouse gas emissions and tackle climate change, industries are looking for alternatives to power the future without harming the planet. One of the most exciting breakthroughs is green hydrogen, a clean, flexible energy source that could significantly build a carbon–neutral future. This chapter will shed light on the role of green hydrogen in the global energy transition, providing insights into hydrogen’s strengths and limitations. Furthermore, this chapter will discuss the environmental impacts of green hydrogen production, including its potential to significantly reduce carbon emissions and promote sustainability. This chapter will explore hydrogen's technical and environmental benefits and examine its social and economic impact. It will highlight how green hydrogen can be key in cutting emissions in hard-to-decarbonize industries while driving regional development and creating new economic opportunities. Ultimately, the chapter aims to show how powerful hydrogen could be in building a low-carbon future while recognizing that getting there will require ongoing innovation, strong policy support, and global cooperation to tackle the challenges ahead.