A picture taken on March 28, 2015 in central London shows the Houses of Parliament before being submerged into darkness for the Earth Hour environmental campaign. Millions are expected to take part around the world in the annual event organised by conservation group WWF, with hundreds of well-known sights set to plunge into darkness. PHOTO: AFP
A combo picture taken on March 28, 2015 in Paris shows the Eiffel Tower being submerged into darkness for the Earth Hour environmental campaign. Millions are expected to take part around the world in the annual event organised by conservation group WWF, with hundreds of well-known sights set to plunge into darkness. PHOTO: AFP
The usually glittering nighttime majesty of the Empire State Building was set to "faint sparkle" in New York, while theaters on Broadway also toned down the neon.
Millions of people around the world were taking part in the annual Earth Hour organized by conservation group WWF, with a string of well-known sights plunging into darkness globally.
The famous Las Vegas strip went dim, with the replica Eiffel Tower at Paris Hotel turning its lights off, along with several hotels and casinos that normally illuminate the main drag in Sin City.
Other US west coast cities marked the occasion by switching off, with the Golden Gate Bridge in San Francisco going dim and the normally bright gateway pylons at Los Angeles LAX airport turned off after being lit in green in honor of the occasion.
Candles in paper bags are placed to form the lettering "Save our climate, Now" in front of the Brandenburger Gate in Berlin during the the global climate change awareness campaign "Earth Hour" on March 28, 2015. PHOTO: AFP
Further south in the Americas, landmarks in Mexico City and Rio de Janeiro were also lights out for the hour, shrouding parts of the cities in darkness.
Earlier in Paris, the Eiffel Tower went black for only five minutes -- due to security reasons -- while nearly 300 other monuments in the City of Light also switched off their lights.
St Peter's Basilica is seen before the lights are turned off as part of the Earth Hour campaign on March 28, 2015 at the Vatican. PHOTO: AFP
This year's Earth Hour comes as the French capital prepares to host a crucial UN climate conference in December that will bring together the international community to discuss efforts to limit global warming.
In Berlin, activists at the unlit Brandenburg Gate placed candles in paper bags that were lined up to spell out "Save our Climate! Now!", while the Kremlin in Moscow also shed its evening diamonds.
This picture shows the ancient Temple of Parthenon atop Acropolis hill in the dark during the Earth Hour initiative in Athens on March 28, 2015. PHOTO: AFP
"It's almost like the thing vanished," said Tony Jennings from Earth Hour after standing under the Sydney Harbour Bridge as the lights went off at 8:30 pm.
In Australia, the initiative this year is focusing on farming, with fears that rising temperatures could ultimately damage the country's ability to produce food.
"In Australia, agriculture is the most vulnerable industry to the impacts of climate change," said national Earth Hour manager for Australia, Anna Rose.
Hong Kong's signature high-rise skyline along the Victoria Harbour was a shadow of itself, with its towering skyscrapers standing dark -- among them the city's tallest building, the 118-story International Commerce Centre.
A combo picture taken on March 28, 2015 in central London shows the Houses of Parliament being submerged into darkness for the Earth Hour environmental campaign. PHOTO: AFP
In Taiwan, the lights went off on the Taipei 101 tower, the world's tallest building before it was overtaken by Dubai's Burj Khalifa, while in Kuala Lumpur the usually dazzling Petronas Twin Towers were dark.
In neighboring Singapore, all Earth Hour events were cancelled because of the mourning mood following the death of the city-state's founding prime minister Lee Kuan Yew.
A combo picture taken on March 28, 2015 in central London shows the Houses of Parliament being submerged into darkness for the Earth Hour environmental campaign. PHOTO: AFP
Earth Hour takes place from 8:30 pm local time and encourages citizens, communities, businesses and organizations to switch the lights off for an hour to highlight the plight of the planet.
The initiative began in Sydney in 2007 but quickly went global.
"Over 170 countries and territories have already confirmed their participation; more than 1,200 landmarks and close to 40 UNESCO world heritage sites," Earth Hour head Sudhanshu Sarronwala told AFP ahead of the event.
This combination image shows the Colosseum illuminated (Top) and with the lights turned off to mark "Earth Hour" in Rome on March 28, 2015. PHOTO: AFP
This year also included a glow-in-the-dark Zumba party in the Philippines, a coordinated candlelit dinner in Finland billed as the world's largest, and restaurant dinners by candlelight in London, said WWF.
Earth Hour's goal is not to achieve measurable electricity savings but to raise awareness of the need for sustainable energy use, and this year also to demand action to halt planet-harming climate change.
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