Earth Hour is an activity proposed by WWF to cope with global climate change, hoping that individuals, communities, businesses and governments turn off lights from 20:30 to 21:30 on the last Saturday of March each year, to show their support to action on climate change. This is a global activity that spreads all over the world quickly after it started in Sydney in 2007. Earth Hour aims to make people aware of the threat posed by climate change and make them aware of a small movement of personal and corporate will have profound impact to the environment.
In China, there are many cities taking part in this activity, especially the large cities, such as Beijing, Shanghai, and Guangzhou. Many citizens consciously turn off lights in the hour and they go out for a walk or some friends gather together to have fun. In college, students will hold some activities to attract students out of dormitory. Earth Hour has variety of activities, but the ultimate goal is the same, that is focusing on climate change and protecting the environment for individuals.
地球一小时是由世界自然基金会提出了应对全球气候变化的一个活动，希望个人、社区、企业和政府在每年3月份的最后一个周六20:30至21:30期间关灯，来支持对气候变化采取行动。这是一个2007开始在悉尼开展迅速遍及世界各地的全球性的活动。地球一小时活动旨在让人们意识到气候变化的威胁，使他们认识到个人和团体的小举动对环境产生深远的影响。
在中国，有很多城市参加了这个活动，尤其是大城市，如北京、上海、广州。这个时候许多市民自觉地关掉灯，他们出去散步或和一些朋友聚在一起玩。在大学里，学生会举办一些活动来吸引学生走出宿舍。地球一小时有各种各样的活动，但最终的目标是相同的，都是关注气候变化和保护环境。
