Asian asks individuals and businesses to turn off their lights at the hour p.m . Big Ben , the International Space Station and Eiffel Tower will go black . Organizers have pledges from 147 countries and 147 cities to go dark . In Dubai , the world 's tallest building , the Burj Khalifa , will switch off its lights . An astronaut on the International Space Station will blog on event from orbit .
Asian asks individuals and businesses to turn off their lights at the hour p.m . Big Ben , the International Space Station and Eiffel Tower will go black . Organizers have pledges from 147 countries and 147 cities to go dark . An astronaut on the International Space Station will blog on event from orbit .