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(CNN) --
Tonight, for the 15th year in a row, people around the world will turn off their lights for an hour.
It is part of a global campaign called Earth Hour.
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What is Earth Hour?
Earth Hour is an annual tradition started by the World Wide Fund for Nature (WWF) in 2007 in Sydney, Australia, to raise awareness of climate change.
Participants in more than 190 countries will turn off their lights for an hour on Saturday.
World landmarks — such as the Sydney Opera House, India Gate, Beijing Phoenix Center in China, Brandenburg Gate in Germany, Colosseum in Italy, Empire State Building in the United States, and Christ the Redeemer in Brazil — turn off their lights to show their support for the campaign.
What is the purpose of Earth Hour?
WWF describes the event as a symbol of "unity" and "hope" for a sustainable future.
"Earth Hour aims to raise awareness and spark global conversations about protecting nature, tackling the climate crisis and working together to shape a better future for all of us," says WWF on the Earth Hour website. of the Planet.
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The Earth Hour campaign has given rise to other actions related to containing climate change.
WWF's chapter in Uganda, for example, created the first "Earth Hour Forest" in 2013. In addition, Argentina used its 2013 Earth Hour campaign to help pass a bill in the Senate for an Area Protected Marine of 3.4 million hectares in the country, according to WWF.
How can I participate?
You can mark Earth Hour by turning off the lights from 8:30 to 9:30 pm in your local time zone.
The official Earth Hour website suggests seven ways supporters can spend the hour without lights, including reconnecting with nature and attending local Earth Hour events in their communities.
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Myth or Reality?
WWF also recommends that supporters "take action beyond the hour, whether that's supporting a local WWF project or getting involved in Earth Hour campaigns in your own country, or starting the movement in your own community."
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