Sacyr's Blog

Hundreds of photovoltaic cells, groundwater wells and heat pumps. These are some of the features shared by some net-surplus-energy buildings: those capable of producing more energy than they consume.

Javier Domínguez Bravo, a researcher at the Center for Energy, Environmental and Technological Research (CIEMAT) and head of the Renewable Energy and Geographic Information Technologies Group (GTIGER), uses maps to find new energy models. 

The most amazing tech devices on the planet are showcased every January at CES in Las Vegas, the world's biggest technology extravaganza. This year, innovations such as solar cells that work indoors are among the highlights. They are the stars of a new generation of green gadgets.