Cities around the world turn off lights to mark Earth Hour

Philippine Boy Scouts switch on 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)

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)

HONG KONG — 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.

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