Add Yahoo as a preferred source to see more of our stories on Google. The lights on the historic building at the Grand Place were switched off for one hour as part of the international "Earth Hour" ...

UNESCO will partner with World Wildlife Fund (WWF) for Earth Hour, one of the world's largest and most well-known environmental campaigns in the world. UNESCO has invited World Heritage sites to ...

The Santa Monica Pier Ferris wheel will go dark Saturday night as part of Earth Hour, joining landmarks around the world in the annual event aimed at promoting energy conservation and climate action.