Snow can be removed from rotating solar arrays by simply turning them sideways at sunrise, perfectly clearing them as the sun warms them up. If you're really e

Snow can be removed from rotating solar arrays by simply turning them sideways at sunrise, perfectly clearing them as the sun warms them up. If you're really enterprising you can turn them upside down at night. Can't say the same for the roads anywhere I've lived. Also, those dull grey cement highways used to be gleaming white when they were poured but alas, car tires are black and turn everything they touch black as well.