Bioenergy is one form of renewable energy among many from other sources (wind, solar, hydraulic, geothermal etc). Feedstocks for bioenergy are storable, bioenergy can thus be produced constantly and is a reliable source of energy. It is amply available in all parts of Europe. That is why bioenergy accounts with about two thirds by far for the largest share in total renewable energy. Bioenergy comes either in the form of solid biomass, biogas or of biofuels. It can generate electricity, deliver heat directly or come as a fuel. Biomass is provided by forestry - which provides half of the EU's renewable energy - agriculture and organic waste. Liquid biofuels are currently mainly made out of agricultural crops.