The Brooklyn Bridge is seen with its lights turned off, in participation with Earth Hour, in New York March 31, 2012. Lights started going off around the world on Saturday in a show of support for renewable energy. REUTERS/Allison Joyce (UNITED STATES - Tags: ENVIRONMENT SOCIETY)
POL102 - VARSOVIA (POLONIA), 31/3/2012.- Combo fotográfico que muestra dos fases de iluminación hasta apagarse totalmente del Estadio Nacional junto al río Vistula, durante la "Hora del Planeta" en Varsovia (Polonia). La hora del planeta se lleva a cabo alrededor del mundo a las 8.30 pm. hora local y es un llamado global a apagar las luces durante 60 minutos para hacer enfasis sobre el peligro del cambio climático. EFE/PAWEL SUPERNAK / PROHIBIDO SU USO EN POLONIA
A combination photo shows The City Hall of Puebla with the lights turned off (top) and with the lights turned back on in participation with Earth Hour in Puebla March 31, 2012. Lights started going off around the world on Saturday in a show of support for renewable energy. REUTERS/Imelda Medina (MEXICO - Tags: ENVIRONMENT SOCIETY)