Sand Batteries Are a Game Changer for Clean Energy

This month, Finland switched on the world’s biggest sand battery, which will “enable residents to eliminate oil from their district heating network, thereby cutting emissions by nearly 70 percent,” according to Euro News. And if it keeps running as cheaply and efficiently as it appears to be doing now, don’t be surprised if sand batteries start popping up around the world – even in your neck of the woods.  The battery, built by Finnish company Polar Night Energy, employs a form of thermal energy storage by using…