中国人很勤奋,受“一日之计在于晨”的影响,大多数爱锻炼的人都有晨练的习惯,但是清晨并不适宜锻炼。首先来看看外界因素:一是植物在夜间也吸氧,呼出二氧化碳,因此,树木多的地方,早晨集聚二氧化碳较多。二是夜间逆温层出现较多,致使清晨空气不佳。在夜间,风速较小,近地面数百米 The Chinese are very hardworking. Influenced by “one day’s plan lies in the morning”, most people who love to exercise have the habit of morning exercise, but it is not suitable for exercise in the early morning. First, let’s look at the external factors: First, plants also take in oxygen at night and exhale carbon dioxide. Therefore, there are many places where trees gather more carbon dioxide in the morning. Second, the night temperature inversion layer appears more, resulting in poor air quality in the early morning. At night, the wind speed is small, hundreds of meters near the ground