The term applies when a hydrogen production plant is powered by a renewable (or “green”) energy source. The color-descriptors change when other energy sources are used. For example: Green hydrogen — when coupled with renewable energy sources  Gray hydrogen — when coupled with fossil-fuel energy sources Blue hydrogen — when coupled with natural gas and using carbon capture and storage Pink hydrogen — when coupled with nuclear power (also referred to as red or purple) Our electrolyzer technology and our plant design are agnostic when it comes to energy sources. That said, our eDynamic cell and the plant architecture based on it seamlessly integrate with renewable energy sources, and deliver industry-leading performance with green energy.