A combination photo shows people walking past the skyscrapers Shanghai World Financial Center, Shanghai Tower and Jin Mao Tower (L-R) before (top) and during Earth Hour at the financial district of Pudong in Shanghai March 29, 2014. 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. REUTERS/Carlos Barria (CHINA - Tags: SOCIETY ENVIRONMENT)
This combination picture of two photographs show the Wat Arun Ratchawararam Ratchawaramahawihan Buddhist temple before (top) and after (bottom) its lights were turned off to mark Earth Hour in Bangkok on March 29, 2014. Lights will go off in some 7,000 cities around the world for this weekend's Earth Hour event, which will aim to raise hundreds of thousands of dollars for environmental projects worldwide. AFP PHOTO/PORNCHAI KITTIWONGSAKUL
RIT01. Manila (Philippines), 29/03/2014.- A Filipino couple observes buildings who tuned off their lights during the celebration of Earth Hour in Bonifacio Global City, south of Manila, Philippines, 29 March 2014. Earth Hour is a campaign to encourage businesses, communities and individuals to take the simple steps needed to cut their emissions. The event is the seventh annual 60 minutes of self-imposed darkness intended to highlight the need to cut greenhouse gases behind global warming. EFE/EPA/RITCHIE B. TONGO