Cities Switch Off Lights for Earth Hour
From the Sydney Opera House to Rome's Colosseum to the Sears Tower's famous antennas in Chicago, floodlit icons of civilization went dark Saturday for Earth Hour, a worldwide campaign to highlight the threat of climate change.
The environmental group WWF urged governments, businesses and households to turn back to candle power for at least 60 minutes starting at 8 p.m. wherever they were.
The campaign began last year in Australia, and traveled this year from the South Pacific to Europe to North America in cadence with the setting of the sun.
