What is Earth Hour?
[[File:Botanical Garden of Curitiba, Paraná, Brazil (Earth Hour 2010).gif|260px|thumb|The [[metal]] structure of the [[greenhouse]]s of the [[Botanical Garden of Curitiba|curitiban Botanic Garden]] ([[Curitiba]], [[Paraná (state)|Paraná]], [[Southern Brazil]]), with its [[light]]s off on [[March 27]], [[2010]].]] '''Earth Hour''' is an [[event]] organized by the [[World Wide Fund for Nature]] (WWF). It is held on the last [[Saturday]] of [[March]] every year. The WWF asks people to shut off their lights and [[wikt:appliance|appliances]] for one hour. They want to raise awareness for [[climate change]]. It was started in 2007. ==Other websites== *{{Official website|http://www.earthhour.org|name=Earth Hour official website}} {{stub}} [[Category:International environmental organizations]] [[Category:Climate change]] [[Category:Energy conservation]] [[Category:2007 establishments]] [[Category:March observances]]