Earth Hour | WWF
© WWF
© WWF
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© Leonie Sii / WWF-Australia

What is Earth Hour?

Started by WWF as a symbolic lights-out event in Sydney in 2007, Earth Hour is now one of the world's largest grassroots movements for the environment. Held every year on the last Saturday of March, Earth Hour engages millions of people in more than 180 countries and territories, switching off their lights to show determination to prevent climate change ans nature loss.  
 
Switching off the light may be a small action, but it is so much more than that. It is a symbol of unity. It is a symbol of hope. It is a symbol of power in collective action that we can have when we take action together to protect the life in this planet.

WWF

Earth Hour then and now

In 2007, we encouraged people around the world to switch off their lights to call attention to climate change. More than a decade later, the climate crisis remains, made worse by another urgent threat: the rapid loss of biodiversity and nature.

Natural systems are vital for all our futures – and yet, the rate of global loss of nature during the past 50 years is unprecedented in human history. Nature not only provides us food, water, clean air, and other services worth over US$125 trillion a year – it is also one of our strongest allies against climate change. Protecting nature is one of the most immediate, powerful, and cost-effective solutions to the climate crisis.

Today, Earth Hour aims to spark global conversations on protecting nature not only to combat the climate crisis, but to ensure our own health, happiness, prosperity and even survival.