Seaweed could be used as a green fuel alternative, research by Scottish scientists revealed today. The research details how marine algae could be farmed to produce biomass fuel for homes and transport. Other forms of biomass have drawn criticism because valuable land for crops and animals have been lost in the demand for clean alternatives to fossil fuel. Methane from the algae could be harnessed to generate electricity and residue could be used as a nutrient supplement for agriculture, the research showed.