Combo picture shows Earth Hour being observed at Berlin’s Brandenburg Gate, the Cologne Cathedral and in Frankfurt’s city centre during and before the lights were switched off

Combo picture shows Earth Hour being observed at Berlin’s Brandenburg Gate, the Cologne Cathedral and in Frankfurt’s city centre during and before the lights were switched off

Earth Hour is observed at Berlin’s Brandenburg Gate, the Cologne Cathedral and in Frankfurt’s city centre (L-R) during (top) and before the lights were switched off, in this combination picture taken March 23, 2013. Earth Hour, when everyone around the world is asked to turn off the lights for an hour from 8.30 pm local time, is meant as a show of support for tougher actions to combat climate change. REUTERS/Tobias Schwarz/Wolfgang Rattay/Lisi Niesner (GERMANY – Tags: ENVIRONMENT TRAVEL SOCIETY ENERGY)