Energy-storing concrete bricks could be key to proliferation of renewables

Renewable energy could reliably power the grid at peak times using an eco-friendly and cost-effective storage solution designed by Swiss start-up Energy Vault. The technology, which works by moving concrete bricks around, has more longevity than batteries and more versatility than pumped hydroelectricity — two major current methods for storing energy. It offers a possible solution to one of the key problems of renewable energy sources like wind and solar, which because they are produced intermittently, ne