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The celebration of Earth Day on April 22nd began in the United States in 1970 and was the brainchild of Senator Gaylord Nelson, who had long pondered about finding a way to "put the environment into the political 'limelight' once and for all" . Earth Day is a perfect time to reflect about what you are doing to help protect the environment. There are many ways that you can celebrate alone and with others。 1970年，美国的民主党参议员盖洛德·尼尔森提议将每年的4月22日立为“地球日”。他表示自己思虑许久，想找到一种能“一劳永逸地让环境问题走进政治舞台的聚光灯下”的办法。地球日是个适合用来反思“我为保护环境到底做了些啥”的日子。以下是一些推荐可以供你采纳，可以独自一人进行也可以跟别人一起。 1. Plant trees 种树 As the date also roughly coincides with U.S. Arbor Day, over time Earth Day has taken on the role of tree-planting. Planting trees helps to reduce greenhouse gas emissions, cleans pollution, secures soil in place to prevent erosion, and provides homes for a lot of biodiversity。 地球日距美国的植树节很近，久而久之，地球日已经差不多变成了植树日。多植树能帮助减少温室气体排放、减轻污染、保护土壤免遭腐蚀，并为生物多样化提供良好的环境。 2. Reduce, reuse and recycle all day long 减少浪费、加强回收利用 | 
