Several types of biological organisms(e.g.,fungi,bacteria,and algae)have been identified as effective cloud condensation nuclei(CCN),being active in cloud.

• 生物气溶胶中的几类生物体(如真菌、细菌和藻类)都被鉴别出是有效的云凝结核(CCN),并在以活性CCN的形式存在。