An MIT scientist has developed a quick and dirty way to harness solar power using "anything green, even grass clippings." So basically, solar panels made out of yard waste.
This technology is way, way, way, way below the efficiency of commercial solar panels: It converts 0.1 percent of solar energy into power. Commercial solar panels clock in around 10 to 15 percent; the most advanced lab models are pushing even higher.
But the simplicity of the design makes up for that shortcoming.