Ok, why do you think this is the only Earth-like planet in the universe? We're not the only planet out there that could support life, I never claimed that. Earth like objects and planets that could support life have been discovered outside our solar system, and I fully believe that if we exist, life exists elsewhere in some form in the universe.
As for electric cars, I was hoping to avoid such a rediculously dumb question, but since you asked:
"Production and
conversion BEVs using
NiMH battery chemistry typically use 0.3 to 0.5 kilowatt-hours per mile (0.2–0.3 kWh/km).
[8][9] Nearly half of this power consumption is due to
inefficiencies in charging the batteries. The US fleet average of 23 miles per gallon of
gasoline is equivalent to 1.58 kWh per mile and the 70 MPG
Honda Insight gets 0.52 kWh per mile (assuming 36.4 kWh per US gallon of gasoline), so battery electric vehicles are relatively
energy efficient."
-Source - Wikipedia
Basically, electric cars are rediculously efficient, and continuing research into better ways to charge batteries will only make them better. Already, they take about 3 times less energy per mile than a gas powered car. Gasoline is a transition fuel anyways, and you can produce energy out of it much easier and efficiently in large power plants rather than small independent engines. Converting to gasoline itself takes an extraordinary amount of energy.
Would we have to make millions of new power plants to switch cars from gas to electric? No. The amount of energy that would be drawn from the grid would be miniscule compared to what the fertilizer industry uses every day, or the aluminum industry does in a few hours.
Many people also bring up that "clean" cars arent actually clean, as coal power pollutes. I say, better to have a system where a completely renewable is possible (from wind, solar, etc) than one that pollutes no matter what.
