A combination photo shows the Chain bridge before and during the Earth Hour in Budapest

A combination photo shows the Chain bridge before and during the Earth Hour in Budapest

A combination photo shows the Chain bridge before (top) and during the Earth Hour in Budapest, 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 actions to confront climate change. REUTERS/Laszlo Balogh (HUNGARY – Tags: CITYSCAPE ENVIRONMENT TRAVEL)