People hold candles during an event attempting to establish a Guinness World of Record for “Blowing out the most number of candles simultaneously” during Earth Hour in Shanghai March 23, 2013. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (Photo by Carlos Barria/Reuters)
