"LONDON (AP) -- Europe's best known landmarks -- including the Eiffel Tower, Big Ben and Rome's Colosseum -- fell dark Saturday, following Sydney's Opera House and Beijing's Forbidden City in joining a global climate change protest, as lights were switched off across the world to mark the Earth Hour event.

In the United States, the lights went out at the Empire State Building in New York, the National Cathedral in Washington, D.C., and the Coca-Cola headquarters in Atlanta, among many other sites in the Eastern time zone.

Millions were expected to turn off lights and appliances for an hour from 8:30 p.m. in a gesture to highlight environmental concerns and to call for a binding pact to cut greenhouse gas emissions. This year's was the fourth annual Earth Hour, organized by the World Wildlife Fund."

David Stringer reports for the Associated Press March 27, 2010. [2]