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This Saturday night at eight thirty, all the lights will be shut off at the Tokyo Tower in Japan. The Brandenburg Gate in Berlin and the Eiffel Tower in Paris are also expected to go dark. So is the Empire State Building in New York and buildings in other cities around the world.
The lights will stay off for one hour for an event called Earth Hour. The observanceis organized by a conservation group, the World Wide Fund for Nature, also known as the World Wildlife Fund.
