Telegraph: To one side of the fence, a herd of bison grazes against a backdrop of low mountain peaks, the unmistakable landscape of America’s West. To the other, a workforce in yellow construction helmets and orange safety vests is bolting solar energy panels to steel tresses in rows several hundred yards long. The flat, glass-coated panels, each one measuring four feet by two, shimmer in the sunlight. The men are laying half a million of them, each one guaranteed to last for 25 years, over 240 …