"Ford's electrified vehicles offer a great combination of efficiency, performance, technology and affordability that we believe will help spur adoption of these advanced vehicles, " says Kevin Layden, director, Ford Electrification Programs and Engineering.

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These are designed to tax dirty vehicles more heavily through a combination of annual levies and a one-off purchase tax.

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But the big gainers, of course, are vehicles that look--and are--a combination of station wagon, minivan and SUV built on the underpinnings of passenger cars.

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Here are the pros and cons of various philanthropic vehicles, which may be used separately or in some cases in combination with each other.

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In combination with a high-deductible insurance policy, these tax-free savings vehicles allow patients to save money for routine healthcare expenses and to roll over tax-free to the next year.

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Autonomous driving in slow traffic is a logical combination of adaptive cruise-control and the lane-keeping systems, already available in some vehicles, which either warn the driver if the car starts to drift out of lane, or apply corrective steering to keep it in lane.

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