Sea World, Orlando City Hall and several Orlando businesses join expected millions in turning lights off

Earth Hour 2010, expected to be the " largest-ever call to action on climate change" asks you simply to turn off your lights Saturday, March 27th from 8:30 p.m. - 9:30 p.m. Its a global event in which people across the world turn out their lights for one hour. Last year it attracted more than 80 million participants in the U.S. and nearly a billion people around the world.

The date was set in March because it is close to the Spring Equinox, a period when the most number of countries around the world will experience darkness in the 8 o’clock hour.

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.

The City of Orlando is also having City Hall participate. Others in Orlando participating include Angelbilt Building, Bank of America, Beachcombers Bazaar, Citrus Center, CNL, College Park Yoga, Colonial Guy, Fairwinds Building, Foster Productions, Gallery At Avalon Island, Gateway Center, Highwood Properties, Mother Falcon Clothing, Nora's Lake Ivanhoe Wine and Cigars, One Orlando Center, Orlando Utilities Commission, Saint Lawrence Title, Suntrust Building, The VUE at Lake Eola