Tokyo Tower, obscured at center left, soars into the Tokyo skyline after being turned off its lights to mark the annual Earth Hour Saturday, March 27, 2010. Tokyo Tower was turned off the lights for an hour, calling for a binding pact to cut greenhouse gas emissions. Buildings in some 4,000 cities in more than 120 countries were expected to unplug to reduce energy consumption and draw attention to the dangers of climate change, according to organizers. (AP Photo/Hiro Komae)