RUSSIA/

The Arch of the General Headquarters Building is pictured after Earth Hour in St. Petersburg 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/Alexander Demianchuk (RUSSIA - Tags: ENERGY SOCIETY ENVIRONMENT TRAVEL)