To mark its 75th anniversary, the United Nations has launched the largest global conversation on the role of global cooperation in building the future we want. However, we can't have a clear glimpse of the future without first understanding the past.

That's why the UN, in partnership with GOOD, is celebrating Leap Day, February 29, by highlighting some of the greatest "Leaps for Humanity." Both organizations believe that climate change is the most pressing issue facing the planet, so we've decided to highlight some of the greatest "leaps" humanity has made to combat the crisis.

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