Chicago takes part in Earth Hour

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Millions of people turned out their lights Saturday night for Earth Hour.

It was created out of concern for the environment.

Lights went out in the Chicago area at 8:30 p.m.

Many city landmarks joined in on the energy-saving initiative, including the Chicago Theater, Navy Pier and the Willis Tower.

Earth Hour started in one city in 2007.

It’s now celebrated in 7,000 cities throughout 152 countries.

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