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许多人认为,越早起床到树林中锻炼身体越好,越能呼吸新鲜空气,其实这是不科学的。因为夜间树木不能进行光合作用,树木自身呼吸产生的大量二氧化碳沉积在树丛中,树木密度越大,二氧化碳的浓度就越高。若此时在树林中锻炼,就会吸入大量的二氧化碳,运动越剧烈,吸入的二氧化碳就越多,会出现头晕、乏力等症状,重者会中毒昏倒。
Many people think that the sooner you get up to the woods to exercise the better, the more able to breathe the fresh air, in fact, this is unscientific. Because of the inability of trees to carry out photosynthesis at night, large amounts of carbon dioxide produced by the trees’ own respiration are deposited in the trees and the higher the tree density, the higher the concentration of carbon dioxide. If this time in the woods exercise, it will inhale a lot of carbon dioxide, the more intense exercise, the more carbon dioxide inhalation, there will be dizziness, fatigue and other symptoms, severe poisoning will fainted.