The document discusses the potential for hydrogen energy as an alternative to fossil fuels. It outlines the various components involved, from production through delivery, storage, conversion and end use. While promising, hydrogen energy technologies are still in development and lag behind other renewable options like solar and wind. The document argues researchers should focus on improving biophotolysis for production, carbon adsorption/physisorption for storage, and fuel cells for conversion to help hydrogen energy contribute to the global energy supply in the future.