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世界地球日黑板报内容
世界地球日(World Earth Day，4月22日)
活动起源于美国。1970年4月22日，在美国民主党参议员盖洛德尼尔森(Gaylord Nelson)和哈佛大学学生丹尼斯海斯的倡议和组织下，美国数十万群众参与了声势浩大的“地球日”活动，呼吁创造一个清洁、简单、和平的生活环境。 作为现代环保运动的开端，“地球日”活动推动了多个国家环境法规的建立。
1990年4月22日，全球140多个国家、2亿多人同时在世界各地举行形式多样的环境保护宣传活动，呼吁改善全球整体环境。这项活动得到了联合国的肯定。
2009年4月22日，第63届联合国大会一致通过决议，决定将今后每年的4月22日定为“世界地球日”。
20世纪90年代，“地球日”的发起人创立了“地球日网络”组织，将全世界环保主义者联合起来推动“地球日”活动的开展。 地球是人类的共同家园，但人类的活动却对地球造成了严重的破坏。生物赖以生存的森林、湖泊、湿地等正以惊人的速度消失;煤炭、石油、天然气等不可再生能源因过度开采而面临枯竭;能源燃烧排放的大量温室气体导致全球气候变暖，由此引发的极地冰盖融化、海平面上升等问题威胁到人类的生存发展。 保护地球资源环境、寻求可持续发展模式已刻不容缓。
在2009年“世界地球日”来临之际，“地球日网络(Earthday Network)”发起“绿色一代(GREEN GENERATION)”计划，倡导人类社会经济发展向可持续模式转变。该计划呼吁公众维护三条核心原则：消除人类对化石能源的依赖性，致力于可再生能源的开发利用，创造一个“无炭”的未来;承诺个人消费习惯与可持续发展要求相符合;建立“绿色经济”，通过为贫困人群创造“绿色岗位”使其脱贫，并将全球教育体系转变为环保型。
从20世纪90年代起，中国在每年的4月22日都举办“世界地球日”宣传活动，并根据当年的情况确定活动主题。
最初的地球日选择在春分节气，这一天在全世界的任何一个角落昼夜时长均相等，阳光可以同时照耀在南极点和北极点上，这代表了世界的平等，同时也象征着人类要抛开彼此间的争议和不同，和谐共存。传统上在很多国家都有庆祝春分节气的传统。早期联合国也在每年的春分举行世界地球日的活动。
Background Information: Earth Day
April 22 is Earth Day, our country this year to determine the theme of "treat the earth, protect the environment."
Earth Day originated in the U.S.. In 1969, Democratic Senator Gaylord Nelson proposed the park in the U.S. schools held workshops on environmental issues, and the following year on April 22 as "Earth Day." Then 25-year-old Harvard Law School student Dennis will soon be the proposal throughout the United States into a large-scale community-based activities, specific ideas, and get enthusiastic support of many young students. April 22, 1970, the United States for the first time held a massive "Earth Day", around 2,000 people participated, the United States since World War II, was hailed as the largest social activities.
April 22, 1990, more than 140 countries around the world, 200 million people around the same time held a variety of promotional activities, the theme is how to improve the overall global environment. The event made people more clearly recognize, as the global industry continues to develop, ozone layer destruction, and the resulting global climate change, is becoming a direct threat to the global problem of human existence. The activities of the United Nations approval, then, every year on April 22 was identified as the "World Earth Day."
Currently, the more prominent environmental issues, soil erosion, desertification, pollution of freshwater resources. According to UN figures released by the 20th century, the world's forest area 90 at an average annual rate of 2.4% reduction in the past 10 years, the world's total forest area of the disappearance of 94 million hectares. At present nearly half the land surface and more than one billion people affected by desertification. Pollution in the atmosphere, from 1965 to 1998, global carbon dioxide emissions doubled. The world is facing a water crisis in many countries: 12 million people short of water, 3.0 billion people lack water sanitation
Each year from 3,000,000 to 400 million deaths and water-related diseases. By 2025, the water crisis will be spread to 48 countries, 35 million are trapped by the water.
Earth Day activities held to raise human caring for the earth, protect the home in promoting the coordinated development of resource development and environmental protection. My 90 years from the 20th century, the annual April 22 Earth Day celebrations are held.
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