Scientists are examining biomass – plant matter that’s grown and used to generate energy – as a potential power source. Two biomass technologies involve ethanol and electricity. Biomass converted into ethanol, a corn-based fuel, can power internal combustion vehicles. Biomass converted into electricity can fuel a vehicle powered by an electric battery. A study by University of California, Merced, Assistant Professor Elliott Campbell and two other researchers in the online edition of this week’s Science journal suggests that biomass used to generate electricity could be the more efficient solution.