VietNamNet Bridge – The World Wildlife Fund (WWF) has announced that the Earth Hour 2011 will take place at 8.30 pm of Saturday, March 26. The major difference is that more thanlights will be turned off for one hour.

This year, the Earth Hour program calls for individuals, businesses and governments in the world to take various actions to reduce the volume of CO2 discharged to the environment during the year.

Earth Hour 2011 will be launched at 8.30 pm, March 26, many cities in the world will turn off their lights in response to the program. The program organizer also releases the message: “Apart from turning light during the Earth Hour, what can you do to make changes for the earth - our home?”

Earth Hour is a annual global event organized by WWF and is held on the last Saturday of March, asking households and businesses to turn off their non-essential lights and other electrical appliances for one hour to raise awareness towards the need to take action on climate change.

Earth Hour was conceived by WWF and The Sydney Morning Herald in 2007, when 2.2 million residents of Sydney participated by turning off all non-essential lights. Following Sydney's lead, many other cities around the world adopted the event in 2008.

Earth Hour 2010 was reportedly the biggest Earth Hour yet, aiming to garner more than the one billion participant goal of 2009's Earth Hour. 126 countries participated in Earth Hour 2010.

In Vietnam, the demand for electricity fell 500,000 kWh during Earth Hour 2010, which was three times larger than the first time the country joined the event in 2009.