Monuments across New Zealand went dark on Saturday as the country kicked off the worldwide Earth Hour event.
The global movement encourages nations to switch off their lights for an hour to bring attention to the issues of nature loss and climate change.
Auckland monuments including the Sky Tower and Harbour Bridge and Wellington's parliament buildings went dark at 8:30 pm (0730 GMT).
Later, other monuments across the globe, including the Sydney Opera House, the London Eye and the Eiffel Tower, will switch off their lights in solidarity.
Now in its 18th year, coordinator WWF International is also asking people to contribute to "Give an hour for Earth," and spend 60 minutes doing something positive for the planet.
Director general Kirsten Schujit said in 2023, over 410,000 hours were given to our planet by supporters in 190 countries and territories, representing 90% of the planet.
"It’s crucial to get involved, if we want to raise awareness about the environmental challenges and bend the curve of biodiversity loss by 2030," she said.
"Protecting our planet is a shared responsibility and it demands collective action from every corner of society."
The initiative began in 2007 in Australia and has seen entire streets, buildings, landmarks and city skylines go dark.