Other incremental improvements range from solar panels that run the air conditioning during stand-still, so fuel is not used to cool down the car, to small electric motors tucked away in the doors and powered by batteries that are charged when a car is braking.

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In the United States, LG Electronics sells a range of stylish and innovative home entertainment products, mobile phones, home appliances, commercial displays, air conditioning systems and solar energy solutions, all under LG's "Life's Good" marketing theme.

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The stadiums will include air conditioning, powered by solar panels.

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Last summer, when temperatures climbed to the low 100s, they used a small air-conditioning unit but offset much of its energy use with the solar panels soaking up the Arizona sun.

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But more that, state regulation allows utilities to put a premium price for solar when they consider bids because solar can be most productive during the time of the day when demand for electricity to run, say, air conditioning , is also higher.

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