️<unk>️<unk>️<unk>️  ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Big Ben and the London Eye switched off their lights for Earth Hour, joining the Eiffel Tower, Brandenburg Gate in Berlin and St Basil's Cathedral in Moscow.<unk> Big Ben and the London Eye switched off their lights for Earth Hour, joining the Eiffel Tower, Brandenburg Gate in Berlin and St Basil's Cathedral in Moscow.<unk> Big Ben and the London Eye switched off their lights for Earth Hour, joining the Eiffel Tower, Brandenburg Gate in Berlin and St Basil's Cathedral in Moscow. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> Big Ben switched off its lights for an hour from 8.30pm to mark Earth Hour, an annual event to highlight the effects of climate change.<unk> Big Ben switched off its lights for an hour from 8.30pm to mark Earth Hour, an annual event to highlight the effects of climate change.<unk> Big Ben switched off its lights for an hour from 8.30pm to mark Earth Hour, an annual event to highlight the effects of climate change. The South Bank was plunged into darkness as Earth Hour started, with the London Eye and the Houses of Parliament turning off the lights.<unk> The South Bank was plunged into darkness as Earth Hour started, with the London Eye and the Houses of Parliament turning off the lights.<unk> Haunting: Big Ben and the Houses of Parliament blended into the night sky shortly after 8.30pm when the lights were switched off. <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> St. Basil's Cathedral also went dark for an hour, starting at 8.30pm local time, to raise awareness about climate change.<unk> St Basil's Cathedral also went dark for an hour, starting at 8.30pm local time, to raise awareness about climate change.<unk> St Basil's Cathedral also went dark for an hour, starting at 8.30pm local time, to raise awareness about climate change. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk> Palace of Westminster, Christ the Redeemer in Rio de Janeiro and even Blackpool Tower were among those switching off, as well as more than 30 Unesco World Heritage sites. Earth Hour was launched in 2007 in Australia and has spread globally since.<unk> Earth Hour was launched in 2007 in Australia and has spread globally since. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>
<unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> Lights at Big Ben, Buckingham Palace, Tower Bridge and Old Trafford switched off for Earth Hour at 8.30pm.<unk> Lights at Big Ben, Buckingham Palace, Tower Bridge and Old Trafford switched off for Earth Hour at 8.30pm.<unk> Lights at Big Ben, Buckingham Palace, Tower Bridge and Old Trafford switched off for Earth Hour at 8.30pm. 700 monuments worldwide went dark, including the Eiffel Tower in Paris and Brandenburg Gate in Berlin.<unk>