There is a new population of the elderly in the U.S.They are 284 million strong, their numbers are growing everyday, and their age is eye-popping: 12.5 years on average.That may not be much for you and me, but this senescent set is not made up of people, but cars.Never before has the American fleet of vehicles been so oldand that spells bad news for the long dreamed-of phase-out of gas powered vehicles, and the environment as a whole.
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