Abstract
In this chapter, the significant challenges in global energy demand and environmental issues were analyzed. The effects of greenhouse gases (GHGs) on the environment, global warming, and climate change and using renewable and sustainable energy (such as wind, solar, geothermal, tidal power, and hydropower) as a solution for GHGs emission reduction were reviewed. The opportunities offered by hydrogen fuel as a green energy carrier were developed, and various methods of green hydrogen production were explained. Hydrogen properties (physical and chemical) and the safety issues during hydrogen production, storage, delivery, and utilization were scrutinized. The role of hydrogen in the policymakers' attitude about the energy mix in the world was explained, and it was highlighted that hydrogen fuel will play a crucial role in the energy mix of the world by the year 2050. A summary of the hydrogen supply chain and research about public acceptance of hydrogen as the fuel of the future was given.
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