摘要: The vast depletion of fossil fuels, the increase in carbon dioxide levels atmosphere, and related environmental hazards represent a growing concern for mankind. Therefore, over past few decades, significant efforts have been made to establish hydrogen economy. Hydrogen is high-efficiency energy carrier, which can lead zero or near-zero emissions at point use. Moreover, it has technically shown that be used transportation, heating, power generation, could replace current fuels all present applications. Besides challenge storing hydrogen, development clean production methods considered as prime hindrance Here, focus provide brief overview processes based on both renewable non-renewable sources proposed produce hydrogen.