Each year, millions of people from over 190 countries and territories coordinate to turn off their lights for just one hour. The event is part of an annual tradition to raise awareness about climate ...

Tonight, for the 15th consecutive year, people around the world will turn off their lights for one hour. It's part of a grassroots global campaign called Earth Hour.What is Earth Hour?Earth Hour is an ...

Don't be surprised if you find your neighbors turning off their lights for a full hour Saturday night. They're taking part in a global movement called Earth Hour. The symbolic effort started in 2007 ...

Each year, thousands of cities around the world recognize Earth Hour by having landmarks go dark and asking residents to turn off their lights. Earth Hour, an event that encourages participation in ...