Earth Hour 2011

Earth Hour 2009 was from 8:30 p.m. to 9:30 p.m. local time, March 28, 2009. 88 countries and 4,159 cities participated in Earth Hour 2009, ten times more cities than Earth Hour 2008 had (2008 saw 400 cities participate). One billion votes was the stated aim for Earth Hour 2009, in the context of the pivotal 2009 United Nations Climate Change Conference.
Among the participants in 2009 was, for the first time, the United Nations Headquarters in New York City. The U.N. conservatively estimates that its participation will save $102 in energy.
Reports show that the United States topped the Earth Hour participation with an estimated 80,000,000 people, 318 cities and 8 states participating. The Philippines saw participation from 647 cities and towns; over 15 million Filipinos were estimated to have joined in the hour-long lights-off. This was followed by Greece with 484 cities and towns participating, and Australia with 309.
The Canadian province of Ontario, excluding the city of Toronto, saw a decrease of 6% in electricity usage while Toronto saw a decrease of 15.1% (nearly doubled from 8.7% the previous year) as many businesses darkened, including the landmark CN Tower.