Desalination plants’ rejected brine which is hazard to the environment, marine life, and the agricultural land can be diluted through a novel approach of reverse electro-dialysis (RED). RED, which is a salinity gradient power generation system, will generate electricity due to salt concentration gradient between the rejected brine and sea water. The energy generated through RED will reduce the specific energy consumption of the desalinated water. In GCC, fossil fuel is used for electricity generation and water desalination, which produce greenhouse gases. Furthermore, due to the high operating cost in terms of fuel used, government subsidies the water desalination plants, which is an extra load on country’s economy. Thus, the reduction in specific energy consumption for water desalination as proposed will affect the region’s economy and environment positively.