The story

Lights went off across the world Saturday as millions of homes and businesses went dark for one hour in a symbolic gesture highlighting concerns over climate change.

More than 2,800 cities and towns worldwide dimmed their lights at 8:30 p.m. local time for the third annual Earth Hour -- a day-long energy-saving marathon spanning 83 countries and 24 time zones.

In New York, the Empire State Building, Central Park and the George Washington Bridge went dark at 8:30 p.m. ET. Read full article »

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