In Ulsan, South Korea, the world's first 'hydrogen apartment' complex, Yuldong With You, has been unveiled in the Buk-gu district. The 437-unit complex is powered entirely by hydrogen fuel cells, reducing residents' electric bills by 30-40% and positively impacting the environment. The Yuldong Combined Heat and Power Plant supplies power to the apartments using hydrogen as a byproduct from nearby industries, showcasing a cost-effective and clean energy generation process. The complex's three fuel cells produce 1.32 MW of electricity from hydrogen, meeting the energy needs of multiple households. Heat generated in the process is stored and utilized for heating the apartment units, making the entire system planet-friendly. Ulsan City officials are working to improve the affordability and sustainability of hydrogen-generated electricity through potential amendments to the Electricity Business Act, aiming for carbon neutrality in the Yuldong With You apartments. This initiative highlights a global trend towards incorporating green technologies in urban development, promoting sustainability and innovation. By embracing clean energy sources like hydrogen, cities can enhance residents' quality of life, reduce electric bills, and mitigate the impacts of climate change and pollution. The shift towards eco-friendly urban living, exemplified by projects like the 'hydrogen apartment' complex in Ulsan, signifies a positive step towards a more sustainable future.