On Earth Hour, hundreds of millions of people around the world will come together to call for action on climate change by doing something quite simple—turning off their lights for one hour. The movement symbolizes that by working together, each of us can make a positive impact in this fight, protecting our future and that of future generations.

The City of Cambridge is again this year joining the growing list of supporting communities that are committing to take a stand by turning the lights out on pollution and creating a cleaner, safer and more secure future as part of Earth Hour Saturday, March 27 at 8:30 p.m. Cambridge will turn off all non-essential lighting in municipal buildings for one hour and residents are encouraged to do the same.

2010 marks the third year of the event, which attracted more than 80 million participants in the U.S. last year, and nearly a billion people around the world, as lights dimmed on such global icons as the Eiffel Tower in Paris, Sydney’s Opera House, the Great Pyramids of Giza and New York’s Empire State Building. 

Notable U.S. landmarks such as Mount Rushmore in South Dakota, St. Louis’ Gateway Arch, Sea World in Orlando, the strip in Las Vegas, New York’s Empire State Building, the Golden Gate Bridge in San Francisco, Washington D.C.’s National Cathedral, California’s Santa Monica Pier and the Space Needle in Seattle are among the hundreds of sites that will turn off non-essential lighting for the hour, in what is expected to be the largest-ever call to action on climate change.