The article discusses the rapid advancements and investment in technologies to facilitate the transition from grey to green hydrogen energy. Presently, low-carbon blue hydrogen from fossil fuels dominates due to lower costs. However, improvements in technology are expected to drive down production costs for green hydrogen produced via electrolysis in the future. The existing infrastructure of natural gas pipelines can be utilized for blue hydrogen transport. Methane pyrolysis offers a CO2-free method to transition from fossil fuels to clean energy, producing grey hydrogen with solid carbon byproducts. The article also highlights the challenges in adapting compression technologies for various hydrogen production methods. Steam methane reforming (SMR), electrolysis, and methane pyrolysis are the primary methods for hydrogen production, each with its own energy requirements and carbon emissions. Carbon capture and sequestration play a crucial role in transforming grey hydrogen into blue hydrogen by capturing and storing CO2 emissions. Electrolysis, fueled by excess renewable power, is identified as a key method for green hydrogen production, particularly alkaline electrolysis which separates hydrogen from water through electrochemistry. The transitioning energy sector faces critical questions and technological advancements to drive the adoption of green hydrogen as a sustainable energy source.