Ball Hour is an initiative put forward by WWF (World Wide Fund for Nature) to deal with global climate change. It is hoped that individuals, communities, enterprises and governments will turn off their lights for one hour at a specific time to show their support for climate change action. The goal of "Earth Hour" in 2009 is to hope that about 654.38 billion people from 654.38+0,000 cities around the world will participate in this activity, and turn off the lights for one hour at 20: 30 on March 28th, 2009 to show public support for reaching a new global climate change agreement.

Climate change caused by excessive carbon dioxide emissions has greatly threatened human survival on the earth. Only by changing the attitude of people around the world towards carbon dioxide emissions can we alleviate the impact of this threat on us.

Everyone must turn off unnecessary lights at 8: 30 pm on March 28th.