NEW YORK–New York’s Empire State Building, the Eiffel Tower in Paris, and the Sydney Opera House were plunged into darkness on Saturday for the annual Earth Hour campaign, leading a global effort to raise awareness about climate change. In a twist to this year’s Earth Hour, Dutch astronaut Andre Kuipers was to observe from the International Space Station countries around the world turn off the lights for 60 minutes and post photos. From Sydney’s sparkling harbor to Egypt’s Tahrir Square, and huge neon billboards that normally light up New York’s Times Square, thousands of cities and businesses opted to go dark across some 150 countries and territories. “Let us stand together to make of our world a sustainable source for our future as humanity on this planet,” former South African president Nelson Mandela urged in a message sent to Twitter, using the hashtag “#EarthHour.” Organizers said the official YouTube channel for Earth Hour was seeing some 20,000 visits per minute as the day rolled on. Among U.S. East Coast landmarks hitting the light switch was the under-construction “Freedom Tower” in lower Manhattan, steadily rising above the New York skyline in place of the destroyed World Trade Center towers, as well as the headquarters of the United Nations. Secretary General Ban Ki-moon said the U.N. was turning off its lights “in solidarity with the men, women and children — 20 percent of all humankind — who live with no access to electricity,” adding that the Earth Hour movement was “a symbol of our commitment to sustainable energy for all.” The towering Washington National Cathedral also plunged into darkness to raise awareness about the urgent need to arrest global warming.
The Pacific island nation of Samoa was the first to make the symbolic gesture, with New Zealand’s city landscapes later dramatically darkened as lights on buildings such as Auckland’s Sky Tower were cut. In Australia, where the event was conceived, harborside buildings went dark, along with most big office buildings as some Sydneysiders picnicked on the harbor foreshore by moonlight. Japan’s Tokyo Tower interrupted its sunset-to-midnight lighting to take part, as organizers said the Earth Hour was an opportunity to pray for last year’s earthquake and tsunami disaster. In Hong Kong the city’s skyscrapers turned out their lights dimming the usually glittering skyline. Tourists and locals snapped pictures, although many were unaware of what was behind the switch-off. Since it began in Sydney in 2007, Earth Hour has grown to become what environmental group WWF says is the world’s largest demonstration of support for action on carbon pollution. A total of 5,251 cities took part in 2011, as the movement reached 1.8 billion people in 135 countries, it says. Newcomers to the worldwide initiative include Libya and Iraq.