This solar array uses molten salt to store energy for later use. It can supply enough energy for 15,000 homes. Check out the slide show.
An aerial view of Nevada Solar One. The site takes up about 300 acres and contains 760 mirror arrays measuring about 100 meters each. Getting energy from this plant, rather than coal plants, reduces carbon dioxide emissions by 200 million tons a year.
The amazing thing is that it has only taken 1 year to build this array. That's actually pretty fast!