The Latest: World cities turn off lights to mark Earth Hour

This combination of photos show the Acropolis hill before and after having its lighting switched off to mark Earth Hour in Athens, on Saturday, March 30, 2019. Earth Hour takes place worldwide and is a global call to turn off lights for 60 minutes in a bid to highlight the global climate change. (AP Photo/Yorgos Karahalis)

Philippine Boy Scouts play with their flashlights at the countdown for the 12th Earth Hour event Saturday, March 30, 2019 in suburban Makati city east of Manila, Philippines. Earth Hour is the symbolic switching off of the lights for one hour to help minimize fossil fuel consumption as well as mitigate the effects of climate change. (AP Photo/Bullit Marquez)

PARIS – The Latest on Earth Hour (all times local):

8:30 p.m.

Top tourist sites in coal-reliant Poland are turning off their lights at 8:30 p.m. in solidarity with global Earth Hour action calling for better climate protections.

In Poland's capital city, Warsaw, the spired landmark Palace of Culture and Science was turning off its night illumination, along with some churches and Old Town walls, all popular tourist venues.

In the southern renaissance city of Krakow, which sees millions of tourists from around the world each year, the central vaulted Cloth Market and the 14th-century red brick St. Mary's Basilica al turned off its lights.

The Earth Hour gesture calls for greater awareness and more sparing use of resources, especially fossil fuels that produce carbon gasses and lead to global warming.

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3:30 p.m.

Cities around the world were marking Earth Hour on Saturday night by turning off the lights in a call for global action on climate change.

In Hong Kong, major buildings along Victoria Harbour turned off their non-essential lights at 8:30 p.m., and the city's popular tourist attraction known as the Symphony of Lights was canceled.

Over 3,000 corporations in Hong Kong signed up for Earth Hour 2019, according to the WWF Hong Kong website. Iconic skyscrapers including the Bank of China Tower and the HSBC Building in Central, the city's major business district, switched off their lights in response to the global movement.

In Taipei, Taiwan's capital, the island's tallest building, Taipei 101, joined surrounding buildings in shutting off the lights as part of the Earth Hour event.

Beginning in Sydney in 2007, Earth Hour has spread to more than 180 countries, with tens of millions of people joining in.