In many countries it has long been the tradition to hold an annual tree or forest festival. The origin of such celebrations dates back to antiquity and is in the dawn of religious feeling and awe for what trees represented. However, Arbor Day, as it is commonly known today, is of American origin and evolved from conditions peculiar to the Great Plains. It was first observed in Nebraska in 1872.
The idea, conceived by J.S. Morton, then a member of the Nebraska State Board of Agriculture, was one of forest conservation. It was a move to promote replanting, following deforestation, and to plant up treeless areas. The idea has spread widely to other lands where it is variously celebrated as the Festival of Trees , Greening Week of Japan, The New Year s Days of Trees in Israel, The Tree-loving Week of Korea, The Reforestation Week of Yugoslavia, The Students Afforestation Day of Iceland and The National Festival of Tree Planting in India. Arbor Day in its various forms is now recognised in more than fifty countries.
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2015届高考英语一轮跟踪训练：必修4 unit2《working the land》
2015届高考英语一轮复习教案：Module 4《Sandstorms in Asia》（外研版必修三）
2015届高考英语一轮跟踪训练：必修5 unit3《life in the future》
2015届高考英语一轮复习教案：Module 3《My First Ride on a Train》（外研版必修一）
2015届高考英语一轮复习教案：Module 3《Music》（外研版必修二）
2015届高考英语一轮跟踪训练：选修6 unit4《global warming》
2015届高考英语一轮复习教案：Module 1《Our Body and Healthy Habits》（外研版必修二）
2015届高考英语一轮复习教案：Module 2《Traffic Jam》（外研版必修四)
2015届高考英语一轮跟踪训练：选修7 unit4《sharing》
2015届高考英语一轮复习教案：Module 4《Carnival》（外研版必修五）
新研究表明:能量饮品混酒喝会增加受伤的风险
2015届高考英语一轮跟踪训练：必修5 unit2《the united kingdom》
2015届高考英语一轮跟踪训练：选修8 unit2《cloning》
2015届高考英语一轮跟踪训练：选修7 unit3《under the sea》
2015届高考英语一轮跟踪训练：必修1 unit5《nelson mandela — a modern hero》
2015届高考英语一轮跟踪训练：必修4 unit4《body language》
2015届高考英语一轮跟踪训练：选修7 unit5《travelling abroad》
2015届高考英语一轮跟踪训练：必修4 unit1《women of achievement》
2015届高考英语一轮跟踪训练：选修7 unit1《living well》
2015届高考英语一轮复习教案：Module 2《A Job Worth Doing》（外研版必修五）
2015届高考英语一轮跟踪训练：必修1 unit3《travel journal》
2015届高考英语一轮跟踪训练：选修8 unit1《a land of diversity》
水果促进大脑的进化:发育得更大
2015届高考英语一轮跟踪训练：选修6 unit5《the power of nature》
2015届高考英语一轮复习教案：Module 3《The Violence of Nature》（外研版必修三）
2015届高考英语一轮复习教案：Module 2《No Drugs》（外研版必修二）
2015届高考英语一轮复习教案：Module 2《DevelopingandDevelopedCountries》（外研版必修三）
2015届高考英语一轮复习教案：Module 5《Newspapers and Magazines》（外研版必修二）
2015届高考英语一轮复习教案：Module 4《Fine ArtsWestern，Chinese and Pop Arts》（外研版必修二）
出轨到底有多普遍?