anjrued123 writes: "Researchers have been working for decades to develop a productive use of one of Earth's most renewable energy sources, the wind. The problem lies in having enough wind to power a large area of space. These flying windmills would fly at heights of 15,000-30,000 feet, and could easily supply enough power to everyone on the entire face of the Earth. Sky WindPower says that their various designs could help save the Earth from an eco meltdown. Their designs range from small kite like instruments, to objects they call "flying farms", which would feature 130-ft wide rotors."