This book explain the production of Bio fuel from algae to reduce greenhouse gas emissions so the global warming reduce too. The microalgae have been suggested as very good candidates for fuel production because of their advantages of higher photosynthetic efficiency, higher biomass production and faster growth compared to other energy crops and they can grow partially anywhere. Also using far less water than traditional oil seed crops, thus there will be no competition with food crops. They are only feedstock that have the potential to replace transportation fuels.