Warren Buffett does not have to travel far from his desk at Berkshire Hathaway’s headquarters in Omaha, Nebraska, a stone’s throw from the Iowa state line, for a look at his expanding fleet of wind turbines.

Driving east, they spring up first at his 153MW Walnut wind farm, and from there they blossom in every direction across Iowa’s farmlands. Soon they will be nearly inescapable in many parts of the Hawkeye State.

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