More than 10 million types of algae exist in the world, and some types contain an abundant amount of lipids. Recently, many countries are developing the technology to turn such algae into biofuel. Watanabe Makoto is a prominent contributor to the research of algae-based biofuel in Japan. He contends that unlike the oil extracted from deep underground, it has the potential to not increase the amount of CO2 in the atmosphere. This segment features the research being done on algae-based biofuel and the progress of utilizing wastewater in the process.
