The Holy City has installed 2,400 photovoltaic solar panels to the top of one of the city's buildings. In doing so, the Vatican will reduce CO2 emissions by 225 tons a year and save 80 tons of oil.
The solar panels are not visible from the ground, but the angels in St. Peter's Basilica may have to wear sunglasses to fight off the glare from the panels.
Implications - The solar panels are located on top of Nervi Hall, which is the place where the Pope often talks to larger audiences. The panels were designed by a German company that made sure the panels would be able to hear, light and cool the hall as well as some of the buildings nearby.