A combination photo shows a view of St. Basil's Cathedral, Red Square and the Kremlin before (top) and during Earth Hour in Moscow March 23, 2013. Earth Hour, when everyone around the world is asked to turn off the lights for an hour from 8.30pm local time, is meant as a show of support for tougher actions to combat climate change. (Photo by Mikhail Voskresensky/Reuters)
