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France's environment minister says diesel fuel, which powers about 80 percent of the country's light-duty vehicles, should be taxed at higher levels for the sake of public health, Bloomberg News reports.

We hear about filling our car's tires with nitrogen from time to time, and it's not always good news. Today, we feature an announcement from GoNitroTire (available after the jump). Guess which side of the fence they sit on.

Fact 1: The US Department of Energy estimates that we could save two million gallons of gasoline every day if our tires were properly inflated.