From above studies, we may come to the conclusion that for generation of electricity from sea water or from salinity gradient with very good power density, we have to find out nonmetal electrodes which would be able to generate very high potential and at the same time would have long life in saline environment. As in GCEQ or CCEQ setup, potential is developed due to the charge accumulation on electrode surface, it is expected that surface polarity of the electrode is the key factor for the generated potential. Thus, we may expect mesoporous carbon electrode may be a very good nonmetal electrode we are searching for. This is used in IDM which supports this proposal. In Fig. For CCEQ setup, we need co-coexistence of sea water and river water or pond water. The natural source is of course where a river mixes with the sea. But, we can't only depend on natural sources as it is limited and in some cases may not be suitable for contraction of a power station. Thus, we may make water reservoir near the sea which would be filled by rain water. A porous barrier should be placed between sea water and rain water. Such a model is shown in Fig. .