Hearst Castle became the first California state park to operate with 100% natural-gas-powered buses. 16 new clean-fuel buses were unveiled June 23 that will reduce harmful air emissions by up to 75 percent replacing the old diesel buses.

Not only will they improve air quality – preserving the pristine nature of the San Simeon area — but also reduce noise, save tax dollars and eliminate reliance on imported oil.

The fleet will transport nearly one million visitors annually from the visitor center to the hilltop Hearst Castle, a 10-mile round trip.

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