One of the sunniest states of the USA, California, knows how to take advantage of its own benefits.  For the last couple of years, the state has been gradually increasing its renewable energy capacity. 

In terms of energy stored per cubic meter, prices, and payback period, researchers in the United Arab Emirates have evaluated the performance of compressed air storage and lead-acid batteries. 

The technique for liquid metal batteries was created in the Group-Sadoway lab at the Massachusetts Institute of Technology by professors Donald Sadoway and David Bradwell. The game-changing battery is called Ambri.