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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.

“地球一小时”是由国际天然基金会应对全球气候变化建议的一项活动，期望自己，社区，公司和政府每年3月的最后一个星期六从20:30至21:30关灯，以示支撑应对气候变化的行动。这是一项全球性的活动，2007年始于悉尼后就敏捷传遍国际。“地球一小时”旨在使人们意识到气候变化带来的要挟，以及使他们认识到自己和公司的细微做法将对环境发生深远的影响。

n 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.

在中国，有许多城市参加了这项活动，特别是大城市，比方北京，上海和广州。许多市民在这时期有意识的关灯，他们出去漫步或许和朋友聚在一起玩。在大学里，学生们也举行了一些活动吸引学生脱离宿舍。地球一小时有多种活动，可是终究的意图都是相同的，都是重视气候变化和保护环境。