植物与环境 大气污染报警器 雪松对二氧化硫和氟化氢这两种气体很敏感,当雪松针叶出现发黄、枯焦现象时,说明周围可能有二氧化硫或氟化氢污染。 紫花苜蓿、胡萝卜、菠菜可以监测二氧化硫污染;菖兰、郁金香、杏、梅、葡萄可以监测氟污染;苹果、桃、玉米、洋葱可以监测氯污染。 Plants and the environment Air pollution alarm cedar is very sensitive to sulfur dioxide and hydrogen fluoride. When cedar needles appear yellow and dry, it may indicate that there may be sulfur dioxide or hydrogen fluoride pollution around. Alfalfa, carrots, and spinach can monitor sulfur dioxide pollution; Cymbidium, tulip, apricot, plum, and grape can monitor fluoride pollution; apples, peaches, corn, and onions can monitor chlorine pollution.