Scientists from the Bar-Ilan University (Israel), together with their industrial research collaborators report the direct production of biodiesel, from an "ecologically-cultivated" marine algae, Nannochloropsis. This type of algae is reported to have a high oil content (30% of dry algal biomass), which can be processed into biodiesel by "transesterification reaction" of the extracted algal oil plus methanol. There are two attractive features of the production process: (1) the algae is cultivated using carbon dioxide liberated from industrial "flue gas" emissions, and (2) the direct, single-step conversion of the algal oil into biodiesel. The rechanneling of the carbon dioxide from industrial emissions back to algal cultivation is a good example of "greenhouse carbon-capture" and recycling. The direct (one-step) conversion of algal oil (without the 2-step process of oil extraction and transesterification) involves the heating of the algal culture with methanol, using microwave or ultrasound application. Oil extraction from the algae is made unnecessary, since microwave or ultrasound irradiation can be applied directly to the algal cultures. These two features have the potential to reduce the cost of marine-algal-biodiesel production. The researchers found that biodiesel yield using the proposed process were higher compared to the conventional two-step process. Furthermore, the higher product yield could be achieved using much shorter reaction times. The full results of the study are published in the journal, Bioresource Technology.