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中文摘要：
针对中国中北部农区松柏增多、榆树类树木减少这一现象,该文分析了产生的原因,从生态角度阐述了这一现象在淡水资源浪费、生物多样性等多个方面的深远影响,并提出了遏制这一现象的政策建议。
英文摘要：
In view of the increase of pines or cypresses and the decrease of elm trees in central and northern of China, this paper analyzes the reasons and describes the profound impacts on the waste of freshwater resources, biodiversity, greenhouse effect and other aspects from an ecological perspective. Finally, it puts forward policy rec-ommendations to curb this phenomenon.
同期刊论文项目
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