In this video, Jay Leno compares modern and old electric cars:
Hybrids, like the Toyota Prius and Locomotives, use a gas or diesel engine AND electric motors with batteries.
Then there's the ordinary gas and diesel engines. Diesel in the US is more expensive and more fuel efficient but since it's not as refined, emissions tend to be dirtier. Almost half of all new vehicles purchased in Europe are diesel. Different place.
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