Biohydrogen: Opportunities and challenges as an alternative energy resource

As the energy demand is continuously rising with increase in population, use of fossil fuels also increasing at same rate. These release greenhouse gases (GHG) which are harmful to human health and our environmental these expected exhaust near future. This eventually has led an emerging need shift a more reliable, sustainable, clean source. Biohydrogen as fuel potential alternative, hydrogen proved be one such replace fuels. There produce it clean, sustainable way compete that being used currently. The produced biologically known biohydrogen. Microorganisms play huge role process generation by virtue their natural mechanism. Hydrogen can using approaches like biophotolysis (direct indirect), fermentation (dark photo) microbial electrolysis cell (MEC). Among all, dark seems most efficient when compared other procedures. challenges currently faced this technology yield hydrogen, high cost reactor system efficiency. still needs lot research improvement entirely.