Moment the Eiffel Tower has total blackout for 'Earth Hour'

Malaysia's Petronas Towers (bottom left), Moscow's St Basil's Cathedral (top right), St. Peter's Basilica (bottom right) and Piccadilly Circus (top right) are among the famous buildings observing the global blackout between 8.30 and 9.30 tonight. Millions of ordinary households are also expected to turn off their lights to send a message to world leaders who they demand front up to protect the Earth, according to the WWF.