Population outburst together witzh increased motorization has led to an overwhelming increase in
the demand for fuel. In the milieu of economical and environmental concern, algae capable of accumulating
high starch/cellulose can serve as an excellent alternative to food crops for bioethanol production,
a green fuel for sustainable future. Certain species of algae can produce ethanol during
dark-anaerobic fermentation and thus serve as a direct source for ethanol production. Of late, oleaginous
microalgae generate high starch/cellulose biomass waste after oil extraction, which can be
hydrolyzed to generate sugary syrup to be used as substrate for ethanol production. Macroalgae
are also harnessed as renewable source of biomass intended for ethanol production. Currently there
are very few studies on this issue, and intense research is required in future in this area for efficient
utilization of algal biomass and their industrial wastes to produce environmentally friendly fuel
bioethano