“A facility like this one on Portugal’s Tâmega River stores energy in the form of water when the wind is blowing hard or on sunny days, and then lets it flow, generating electricity and causing the water level in the upper reservoir to fall, when energy is less abundant and more expensive,” according to the Times.

How to Use GIRA, Lisbon’s Home-Grown Bike-Sharing Network
GIRA works off your phone: download the app, give them your financial details, and you’re ready to bike. This Atlas correspondent was able to do all of that in about 10 minutes. But then the problems began.