Gravity based energy storage is inexpensive to construct and reliable. It is wasteful - but we're capturing an incredibly tiny proportion of the energy availabl

Gravity based energy storage is inexpensive to construct and reliable. It is wasteful - but we're capturing an incredibly tiny proportion of the energy available from wind and solar for electricity. [0]: http://www.powermag.com/let-gravity-store-the-energy/ http://www.powermag.com/let-gravity-store-the-energy/ [1]: https://www.scientificamerican.com/article/energy-storage-hits-the-rails-out-west/ https://www.scientificamerican.com/article/energy-storage-hi...