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Stand near a busy roadway and you'll be buffeted by gusts of wind as cars pass by. The majority of energy used in highway transportation goes to move huge volumes of air out of the way of our vehicles, not moving the vehicles themselves. So why not harness that energy and make it something useful?
Still in the research phase, Oberholzer has evolved his concept to harvest more energy. While his original proposal suggested a single row of vertical-axis rotary turbines, he’s recently discovered that double-stacked Darius turbines will capture the wind from both directions more efficiently. With this refinement, each barrier now “packs much more generating power.”