Batteries for battery powered cars are more environmentally friendly than expected

Batteries for battery powered cars are more environmentally friendly than expected: "Battery powered cars will play a major role in future of mobility. What was not known so far, was how environmentally friendly the manufacture, operation and disposal of the batteries are. Researchers have now calculated the ecological footprint of the most commonly used type, the lithium-ion battery. A car with a petrol engine must consume less than 4 liters of fuel per 100km or about 70 mpg (miles per gallon) in order to be as environmentally friendly as modern electric cars."