As the need for eco-friendly alternatives to fossil fuels grows, hydrogen is gaining attention as a potential solution for decarbonization. The U.S. Department of Energy has set ambitious goals for 'clean hydrogen' production, aiming to scale up to 10 million metric tons by 2030 and 50 million metric tons by 2050. Hydrogen, abundant in nature and not emitting greenhouse gases when used as fuel, holds significant promise in various applications such as transportation and industrial processes. While traditional hydrogen production methods from fossil fuels are carbon-intensive, advancements have led to the emergence of clean hydrogen production techniques. These include blue hydrogen using carbon capture, green hydrogen from electrolysis with renewable energy, turquoise hydrogen from biomass gasification, and nuclear hydrogen. Each method offers a cleaner alternative to fossil-based hydrogen, with varying degrees of environmental impact. The article emphasizes the importance of the carbon intensity of the production process in determining the cleanliness of hydrogen. Proper implementation, such as ensuring clean energy sources power electrolysis, is crucial for achieving emission-free hydrogen production. The U.S. government's support and proposed tax credits aim to incentivize the adoption of clean hydrogen technologies to accelerate the transition to a low-carbon economy.