Jeju Island in South Korea, known for its natural beauty and UNESCO recognitions, is spearheading a sustainable future with a focus on green hydrogen. Officials presented plans to journalists from around the world, highlighting Jeju's vision for a carbon-neutral society by 2035. The island aims to increase renewable energy capacity, with a focus on hydrogen technologies, to combat climate change. With ambitious projects like rainwater harvesting, hydrogen-powered vehicles, and marine ecosystem preservation, Jeju is on track to replace its power sources with renewable energy and green hydrogen. The island has already achieved milestones like becoming South Korea's first net-zero city and surpassing national renewable energy generation averages. By expanding green hydrogen production and investing in a local energy trading market, Jeju is paving the way for a sustainable and innovative energy landscape. Additionally, Jeju is embracing the space industry, capitalizing on its strategic location and unique advantages, to drive future growth and opportunities for generations to come.