"The world said yes to climate action, now governments must follow," the World Wildlife Fund (WWF) said on Sunday, a day after hundreds of millions of people worldwide followed its call to turn off lights for a full hour. From an Antarctic research base and the Great Pyramids of Egypt, from the Colosseum in Rome to the Empire State building in New York, illuminated patches of the globe went dark Saturday night to highlight the threat of climate change. "Last night's message from the masses was loud and clear: Delay no more, real action now!" Kim Carstensen, the leader of WWF's Global Climate Initiative, said in a statement. Negotiators from 175 countries gathered Sunday in Bonn for the latest round in an effort to craft a deal to control emissions of the heat-trapping gases responsible for global warming.