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I am getting tired of people spouting how they are saving the planet by getting an electric car. They aren't saving anything, they are making it worse. Electric powered automobiles that require an external energy source will never be as efficient as a vehicle with its own power plant. It is physically impossible due to energy loss.
Its basic physics. Whenever you transfer energy from 1 medium to another or over distances energy will be used moving the electricity. The shear amount of steps getting electricity from the power plant to the vehicle makes it an idiotic method for powering a vehicle. You create the energy at the plant, transfer it across miles of electrical wire and infrastructure, eventually bringing the energy to your home. This process could have massive loss of energy depending on the infrastructure. At your home it then is transfered across your homes grid, to the outlet, across the wire, into the car, and into the batteries. This process including the batteries is atleast a 50% drop in energy. From here it can be used to power the engine. Sure the remaining power might be 90~98% effecient in moving the vehicle, but you are looking at less then 10% efficiency getting it into the batteries.
This is why a combustion or fuel-cell engine based vehicle is simply superior. You are looking at 18~20%+ efficiency transfering the energy into moving the vehicle. With an electric not only are you getting a worse to drive vehicle, you are also consuming a monumental amount of energy to get that vehicle to move.