There might be a variety of microalgae previously overlooked for biodiesel that is back in the renewable energy game. This article from Biofuels International says scientists from the Universitat Autònoma de Barcelona (UAB) in Spain have identified dinoflagellate microalgae as an ‘easy and profitable way’ of creating biodiesel:

‘If we make simple adjustments to completely optimize the process, biodiesel obtained by cultivating these marine microalgae could be an option for energy supplies to towns near the sea,’ Sergio Rossi, a researcher at the UAB, was quoted as saying.

The article goes on to say that some of the possible adjustments could include reusing leftover organic pulp, the use of air pumps and more efficient cultivation materials.