all existing and future hydropower stations can be expanded with additional pumped-storage hydroelectricity units to cater nighttime electricity consumption. Most of the groundwater pumping power can be met directly by solar power during the daytime. To achieve food security, India needs to achieve water security which is possible only by energy security for harnessing its water resources. Electric vehicles The retail prices of petrol and diesel are high in India to make electricity driven vehicles more economical as more and more electricity is generated from solar energy in near future without appreciable environmental effects. During the year 2018, many IPPs offered to sell solar power below 3.00 Rs/kWh to feed into the high voltage grid. This price is far below the affordable retail electricity tariff for the solar power to replace petrol and diesel use in transport sector. The retail price of diesel is 53.00 Rs/liter in 2012-13. The affordable electricity retail price (860 kcal/kWh at 75% input electricity to shaft power conversion efficiency) to replace diesel (lower heating value 8572 kcal/liter at 40% fuel energy to crankshaft conversion efficiency) is up to 9.97 Rs/kWh. The retail price of petrol is 75.00 Rs/liter in 2012-13. The affordable electricity retail price (860 kcal/kWh at 75% input electricity to shaft power conversion efficiency) to replace petrol (lower heating value 7693 kcal/liter at 33% fuel energy to crankshaft conversion efficiency) is up to 19.06 Rs/kWh. In 2012-13, India consumed 15.744 million tons of petrol and 69.179 million tons of diesel which are mainly produced from imported crude oil at huge foreign exchange outgo. V2G is also feasible with electricity-driven vehicles for catering to the peak load in the electricity grid. Electricity-driven vehicles would become popular in the future when the energy storage / battery technology becomes more compact, lesser density, longer lasting, and maintenance-free. Hydrogen energy The Hydrogen Energy program started in India after joining the IPHE (International Partnership for Hydrogen Economy) in the year 2003. There are nineteen other countries including Australia, United States, UK, Japan, etc. This global partnership helps India to set up commercial use of Hydrogen gas as an energy source. Hydrogen is a carbon neutral fuel. Solar electricity prices in India have already fallen below the affordable price (≈ INR 5.00 per kWh to generate 0.041 lb/kWh hydrogen which is equivalent to 0.071 litres of petrol in terms of lower heating value) to make hydrogen economical fuel by