Earth Hour Marks 10th YearPlaces worldwide turning off lights for an hour to highlight effects of climate change
Observing Earth Hour 2015Gateway Arch and Edwardsville High School among two local venues taking part
Earth Hour 2013 Is Upon UsPeople are being asked to turn off lights from 8:30-9:30pm local time on March 23 to conserve energy.
Lights Out: Illinois to Mark Earth HourIn Chicago, landmarks like the Merchandise Mart, Navy Pier and Wrigley Field will go dark. In Springfield the Governor's Mansion lights will be dimmed.

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