Millions of people from 178 countries and territories are expected to take part in WWF's Earth Hour this year, with monuments and buildings such as the Eiffel Tower, Taipei 101 and the Empire State Building plunging into darkness for 60 minutes from 8:30pm local time.
       
In Sydney, where the Earth Hour idea originated in 2007, many harbourside buildings fell dark as the city switched off for the tenth year in a row.
       
"We just saw the Sydney Harbour Bridge switch its lights off... and buildings around as well," Earth Hour's Australia manager Sam Webb said from The Rocks area. Earth Hour's global executive director Siddarth Das said organisers were excited about how much the movement had
grown since it began in Sydney in 2007.
       
"From one city it has now grown to over 178 countries and territories and over 7,000 cities so we couldn't be happier about how millions of people across the world are coming together for climate action," he said via telephone from Singapore ahead of the lights out.
       
Das said momentum towards climate action was building in the wake of the global climate talks in Paris last year. The so-called Paris Agreement sets the goal of limiting global warming to "well below" two degrees Celsius (3.6 degrees Fahrenheit) over pre-industrial levels, with a more
ambitious target of 1.5 C if possible.
       
Das said people were experiencing the impact of climate change more now than when Earth Hour began, adding that "climate change has now become a more personal topic".
       
"No one is denying the fact that the world is at a climate crossroads, but while we are seeing more and more impacts of climate change we are also witnessing a completely new momentum in climate action that is transcending borders and generations," he said.

 

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