0
A megawatt is one million watts. One watt is a unit of electrical power.
1 horsepower is 746 watts. You would need approximately 1340.5 horsepower to produce 1 megawatt of energy. That's a lot of horses!
it takes 800 gallons of water to make 1 megawatt-hour of electricity (1000 kWh).
The answer depends on the price of electricity which will be different at different times and from place to place.
Because fossil fuels will run out. We need electricity in megawatt amounts. The only viable alternative is nuclear fuels.