Bluemling, Bettina; Mol, Arthur P.J.; Tu, Qin - In: Energy Policy 63 (2013) C, pp. 10-17
While for wind, solar energy or hydropower, energy supply happens directly from the source to the wind wheels, hydropower turbines or solar panels, in the case of biogas, energy production cannot directly take from the energy source, organic matter, but depends on the institutional structures...