一、课题选择近几年我国北方经常发生大范围沙尘暴。沙尘不仅使空气污浊,还因它们携带有大量细菌、病毒,甚至会传染疾病。由此联想到绿色植物的叶面粗糙不平,有的还能分泌油脂,这些功能为植物吸附粉尘创造了条件。那么植物叶子降尘效果有多大呢?我们决定以此为课题做一次研究。 I. Selection of Questions In recent years, large-scale dust storms have frequently occurred in northern China. Dust not only pollutes the air, but they also carry large amounts of bacteria, viruses, and even infectious diseases. From this, it is thought that the foliage of green plants is rough and some of them can also secrete oil. These functions have created conditions for plants to absorb dust. How large is the dust reduction effect of plant leaves? We decided to conduct a study on this topic.