According to the latest issue of the “Monthly Energy Review,” during the first quarter of 2010, renewable energy sources (biomass, biofuels, geothermal, solar, water, wind) accounted for 10.73% of domestic energy production. The combined output of 1.967 quadrillion Btus was 6.6% higher than for the same period in 2009 and 9.7% higher than for the first quarter of 2008. By comparison, nuclear power accounted for 11.54% of domestic energy production while experiencing a drop of 1.5% compared to the first quarter of 2009.