Historically, mass production of green hydrogen was not considered a feasible alternative energy solution due to high costs. However, recent technological advancements in PEM electrolyzers have changed this perception. Electrolyzers are now seen as crucial for achieving carbon neutrality goals. Advancements such as thinner membranes have led to increased hydrogen production and lower energy consumption. Manufacturers are investing in titanium porous transport layers for improved efficiency. Additionally, the development of reduced-iridium coatings has made PEM electrolyzers more cost-effective. Optimizing cell design has also enhanced hydrogen production efficiency. The green hydrogen market is set to expand significantly in the next 25 years, reaching $185 billion. This growth is attributed to the improved efficiency and reduced costs of electrolyzers. The potential for mass production of green hydrogen is now within reach, signaling a promising future for sustainable energy.