From Sydney to Paris, landmarks go dark for 10th Earth Hour

From Sydney Opera House to the Eiffel tower in Paris and the Kremlin in Moscow, landmarks across the globe dimmed their lights on Saturday night for the 10th edition of the Earth Hour campaign calling for action on climate change. Millions of people from 178 countries and territories were expected to take part in WWF's Earth Hour this year, organisers said, with monuments and buildings such as Berlin's Brandenburg Gate and the Empire State Building plunging into darkness for 60 minutes from 8:30