There will never be a long-term inexpensive source of energy. Given that governments and companies (which in many cases are the same thing) know what we are willing to pay for energy, the price for whatever sources of energy might be developed will eventually be raised to the levels that we are willing to pay, or taxed so that you are paying that amount. Once electric powered cars become more of a norm, we'll find that charging stations will be charging us roughly the same amount of money (per mile) to recharge our cars as we are currently paying for gasoline. Look at the price of gasoline. Given that gas prices have been going down here for the past couple of years, every legislative session someone introduces a bill to raise the tax on gasoline. Since they know that we are willing to pay more for gasoline than what the gasoline is currently costing us, they want to collect that in taxes instead. Of course, once the price of gasoline goes up again, the extra taxes will never be rescinded.