At the new Intercontinental Hotels resort at Bora Bora, air conditioning for its 80 villas on a pristine lagoon comes from a system of pipes extending 1.5 miles offshore and 3, 000 feet deep, tapping the cooling power of 41-degree seawater.

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"This could easily degenerate into chaos, " concedes Paul Heitman, a senior program architect at Comverge, which hopes to extend its metering expertise for air-conditioning systems to plug-in cars.

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The cheapest versions won't have air-conditioning or power steering, but Tata hopes its cute looks will make up for missing creature comforts--just as happened with the VW Beetle and the Mini long before it.

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