Input (grade 10): In 2008, about 19% of global final energy consumption came from renewables, with 13% coming from traditional biomass, which is mainly used for heating, and 3.2% from hydroelectricity.
Output (grade 12): At the end of 2009, worldwide wind farm capacity was 157,900 megawatts (MW), representing an increase of 31 percent during the year, Lars Kroldrup.