Male humans have about a 10% larger brain than females. A study of 46 adults aged 22-49 years found an average brain volume of 1273.6cc for men, ranging from 1052.9 to 1498.5cc, and 1131.1cc for women, ranging from 974.9 to 1398.1cc.
World distribution of hydropower. 1  Hydropower is the most important and widely-used renewable source of energy. 2  Hydropower represents about 16% (International Energy Agency) of total electricity production. 3  China is the largest producer of hydroelectricity, followed by Canada, Brazil, and the United States (Source: Energy Information Administration).
In 2011, geothermal energy provided about 65 percent of primary energy, the share of hydropower was 20 percent, and the share of fossil fuels (mainly oil products for the transport sector) was 15 percent. In 2013, Iceland also became a producer of wind energy.ost of the hydropower plants are owned by Landsvirkjun (the National Power Company) which is the main supplier of electricity in Iceland. In 2011, the total electricity consumption in Iceland was 17,210 GWh.