Floating solar power plants
In Japan, two floating solar power plants opened. These plants are capable to supply all energy about 1000 homes.
Power plants are planned to increase reliance on sustainable energy sources. As you know, on 2011, Fukushima nuclear disaster occurred in Japan. Now they are planning to have a more reliable energy policy.
Of course, it is more difficult to build a solar arrays which contains huge amounts of solar cells on the surface of a lake. But, since land space is quite scarce in Japan, the project becomes feasable.
For the details and the video please click: http://www.sciencealert.com/two-enormous-floating-solar-power-plants-have-just-opened-in-japan