AT the height of the controversy surrounding sources of renewable energy, could the powers that be explain why no use is made of the very large (and continuous) supply of renewable energy represented by Meldon and Roadford reservoirs? The insertion of generating turbines into the low level outflows of both these bodies of water would give a source of very low cost energy, which would not of itself interfere with water flow down stream. J C Hindson Woodhouse Farm Hatherleigh