At 8:30 p.m., local time, on March 27, hundreds of millions of people around the globe are expected to turn out their lights to observe Earth Hour. The event is a global initiative begun by the WWF (World Wildlife Fund) three years ago to recognize the need for action on climate change.
This year, 1,100 cities in 100 countries are participating. Lights will go off in some iconic landmarks in major cities. Tokyo Tower and the Brandenburg Gate in Berlin are among landmarks that will go dark for the first time this year, joining familiar U.S. sites, such as Mount Rushmore and the Golden Gate Bridge.
An online toolkit at the Earth Hour web site offers public service announcements, templates for local newsletters and other promotion helps, and classroom lesson plans.