 The biofuels obligation scheme in Ireland has been successful in increasing the use of biofuels in the country. However, there is still a large gap between the targeted 10% biofuels usage by 2020 and the actual usage of 3%. To reach the target, Ireland will need to import more biofuels or utilize other renewable sources. Microalgae and macroalgae are two potential sources of biofuels that can help close the gap. Both have high oil content and can be grown locally, making them attractive options for Ireland. Additionally, both algae types meet the EU's stringent sustainability requirements, meaning they can be used without worrying about environmental impacts. This article was authored by Fionnuala Murphy, Ger Devlin, Rory Deverell, and others.