In 2010, New York City's Empire State Building went dark for Earth Hour. © WWF/Rob Johnson
Turn off your lights tonight at 8:30 p.m. and participate in WWF’s Earth Hour event—a worldwide display of commitment to protect the one thing that unites us all: the planet. More than 130 countries and territories around the world are participating – so you won’t be the only one in the dark!
Once you turn your lights back on, WWF gives you many ideas on how to go beyond the hour.
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