María Regidor co-owns a mini-hydro power plant in Spain, which produces part of the electricity provided to the residents of the Castile and León region.

For most of us, any concerns about computing speed or data storage are usually to make it go faster while storing more. We hardly ever think about the enormous amounts of energy already required to power Internet servers or charge the increasing number of devices we own.

Storm water is a critical consideration in managing urban water , as it influences the risks of flooding. Unfortunately, a global rise in urban population means that water management in urban areas is now under strain.

The German village of Cappel is home to one of the greatest historical music instruments. The ornate baroque organ here is the work of Arp Schnitger, the grand master of German organ construction who built it in around 1680 for Hamburg.