"This year some 7,000 cities in 27 different time zones will be flicking off their
lights in observation of the ninth annual Earth Hour, in an effort to raise climate
change awareness and spread the message of energy conservation. The
campaign was started in Australia by the World Wide Fund for Nature (WWF) in
2007 with 2.2 million people taking part, and since then swept across the world
in what the WWF calls "the world's largest grassroots movement."
In Australia, Earth Hour this year is focusing on farming, with fears that rising
temperatures could ultimately damage the country's ability to produce food.
Here are Earth Hour announcements from Edward Norton and from the famous-
for-a-day shy wildlife visitor, whose name is either Bob Katz or perhaps Buddy.