"The solar ball" will solve the problem of shortage of potable water
About 900 million people is shortage of potable water. The young expert Dzhonatan Ljao has invented an equipment, which transfer the dirty water into a potable. The bottom of the equipment is black for absorption of solar beams. For a day it gives 3 litre of potable water.
The invention of the Australian will be shown at Milan International exhibition of technologies.