按时间长短可分为植树日、植树周或植树月，总称植树节。
According to the length of time, people have Tree-planting Day, week or month to plant trees, and all of them call Tree-planting Day.
他们植树于房屋四周。
80年代以来，每年的“世界环境日”、“植树节”、“ 爱鸟周”等，全国各地都组织大规模的宣传活动。
Since the 1980s large-scale publicity activities have been organized all over the country every year on World Environment Day, Tree Planting Day, Love the Birds Week, etc.
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