There is one study done by world bank in Nepal, which has concluded that, we can have cheaper, reliable and risk-free electricity from coal plant in Nepal than hydroplant. For this, we need to purchase coal from bihar and build powerplants in biratnagar to birgunj belt. The only problem is the environmental pollution. But, for a poor country like Nepal, environment should not be an issue. Our whole country's pollution level will be less than 5% of Mumbai city even if we line up with coal plant throughout in our terai belt for electricity generation.