CNN  —  Each and every 12 months, millions of people from above 190 nations around the world and territories coordinate to change off their lights for just a single hour. The celebration is component of an annual tradition to increase consciousness about local climate modify. Here’s what you want to know ahead of the 16th once-a-year Earth Hour celebration. Earth Hour was released in 2007 by the Planet Wildlife Fund and its partners in Sydney, Australia, according to a information launch from the group. The nonprofit describes Earth Hour as the “largest world grassroots motion for the atmosphere.” “Earth Hour aims to increase awareness and spark global discussions on guarding…