China's economy is growing rapidly, as is the corresponding demand for more and more electricity to sustain its glistening megacities. To help the metropolises become cleaner, even more renewable energy will be used in the future. But the favorable conditions needed to generate it are found far away from the urban areas in the east. Instead, they are found in the sparsely populated western part of the country, such as Xinjiang province. There, it is very windy and there are many hours of sunshine, as well as numerous rivers to generate hydropower. The challenge is to transport the energy over great distances to the east while keeping losses at a minimum.