Arbor Day is the law in some countries to promote the protection of trees, and to mobilize the masses to participate in tree planting activities for the festival. According to the length of time can be divided into tree planting day, week, or planting trees month, collectively International Arbor Day. Through such activities, to inspire people to love the forest, afforestation enthusiasm, raise awareness of forest care, promote afforestation, to love the forest ranger and expand forest resources, the purpose of improving the ecological environment. When China began to commemorate Arbor Sun Yat-sen's death.
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