About 16 % of global final energy consumption presently comes from renewable resources , with 10 % of all energy from traditional biomass , mainly used for heating , and 3.4 % from hydroelectricity .
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 .