Large bridges are full with lights and electric signage and use a lot of electricity. More and more they are being outfitted with solar arrays designed to power all this. Now Blackfriars Bridge in London has taken all this energy creation a step further, generating enough electricity to help power the train station below it and claiming the title as the largest solar-powered bridge in the world. Some 4,400 photovoltaic panels covering 6,000 sq. m (19,685 sq. ft.) are now operational. The goal is for the bridge to produce more than 50% of the station's electricity and reduce CO2 emissions by almost 563 tons per year.