This whole debate reminds me a lot of the myth that electric vehicles are better for the environment. It is all just marketing. Instead of burning gas you are burning coal at some far away plant, less efficiently than an internal combustion engine I might add. That is not to mention all of the rare Earth minerals that have to be mined to make the thing work and all of the pollution that creates.
I think you're right about the rare Earth minerals. Many people overlook that.
But from what I've read electric cars are significantly more efficient than combustible cars. What makes you think otherwise?
EVs convert about 59%–62% of the electrical energy from the grid to power at the wheels. Conventional gasoline vehicles only convert about 17%–21% of the energy stored in gasoline to power at the wheels.
Also, coal is just one of the ways we generate electricity. Tesla is building those solar charging 'gas' stations. I could see that catching on.
EVs emit no tailpipe pollutants, although the power plant producing the electricity may emit them. Electricity from nuclear-, hydro-, solar-, or wind-powered plants causes no air pollutants.
https://www.fueleconomy.gov/feg/evtech.shtml#end-notesInternal combustion engines can be made far more efficient than what is currently on the market. Roll out of commercial efficiency improvements have been suppressed, especially when it comes to diesel technology. Also don't forget the batteries will reach end of life much faster than the car itself as well.
"A combustion engine's thermal efficiency is the heat of combustion of the fuel / work produced.
Contemporary automotive combustion engines have a peak thermal efficiency of around 38%. It can be as high as 40% with large volume EGR, direct injection, and a newer cam phase/lift adjustment system. EDIT: As of 2018, the newest engines are over 40%, with Mazda’s Skyactiv-X a tick higher at something like 44%. I think it’s possible we’ll see a near 50% peak efficiency gasoline engine before everything becomes electric.
Unfortunately typical efficiency on the freeway is only 30%, and goes down the lower your engine load is, down to near 0% at idle (where it's only generating a few hundred watts of electricity to run your car).
An electric motor's efficiency is measured by electrical power in / work produced.
It can also be as low as 0% when stalled, but when it gets moving this number is usually pretty high. Peak efficiency depends on a lot of things, but any cheap electric motor can achieve around 80% and the ones you find in electric cars have something like 92-95% peak efficiency, and typically run at over 85% efficiency.
However this isn't really a fair comparison. Before the electricity reaches the electric motor, it has to (in reverse order):
Pass through the motor controller where it gets converted to AC and its voltage is adjusted, plus all the wiring which has some nontrivial voltage drop at higher current. (around 95% efficient on electric cars)
Be released from the battery, by converting the chemical energy in the battery to electricity (~98% efficient on lithium ion batteries)
Get stored in the battery in the form of chemical energy (depends on how fast you charge it, but ~98% efficient).
Be transmitted from the power plant to wherever your car is charging (varies widely, but fairly efficient)
Be generated at the power plant from thermal energy, or some renewable source (varies widely depending on heat source and type)
If we use a 40% efficient non-combined cycle coal power plant for example, the electric car actually has lower efficiency from coal to wheel vs. the gasoline car from tank to wheel. However gasoline is an expensive, high quality fuel which costs many times more per unit energy than natural gas, coal, nuclear power, etc. which is why an electric car is far cheaper to run as far as fuel goes. Part of the cost of gasoline is the energy and resources it takes to extract, refine, and transport the oil, and if those are included in the energy cost of gasoline then electricity usually wins, as evidenced by the lower cost per mile."
https://www.quora.com/How-energy-efficient-are-electric-motors-compared-to-combustion-engines?share=1