Earth Hour is an annual global event organized by the World Wildlife Fund to raise awareness about climate change. This year's event took place last Saturday night when people across the world turned off all non-essential lights and electrical appliances for one hour.
Since this blog focuses on the United States, here are before and after pictures of American skylines and famous landmarks participating in Earth Hour.
NEW YORK CITY
CHICAGO
SEATTLE
LAS VEGAS
LOS ANGELES
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