1　东北城镇绿化暨萝北县的概况　东北城镇绿化过去主要栽植杨树、柳树来绿化街道和环境。这是基于地处偏北 ,冬季较长又寒冷 ,种植这些耐寒树木易成活 ,能越冬 ,生长快。既利于快速形成绿化环境 ,又利于保持的思想。但是 ,柳絮杨花 ,春季漫天飞舞 ,飘飘洒洒 ,造成环境的污染 , 1 northeast town of green and Luobei County Overview northeast town green in the past mainly planted poplar, willow trees to green streets and the environment. This is based on the northward, long and cold winter, these hardy trees are easy to survive, can winters, grow fast. Not only conducive to the rapid formation of green environment, but also conducive to maintaining the idea. However, catkins poplar, spring sky, fluttering, causing environmental pollution,