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问:绿色植物在有阳光时行光合作用吸二氧化碳放出氧气,在晚上没阳光时只有呼吸作用吸氧气放二氧化碳,为什么总说早晨到树林中散步空气好呢? 答:因为空气流动得很厉害,所以在一般树林中白天夜晚O_2及CO_2含量的改变是极小的.说早晨空气好,并不是植物起了什么作用,而是因为夜间人们的活动停止了,车马不在路上奔驰了,工厂的烟囱不冒烟了.加上树林中的湿度较大,尘土都降落在地上,空气就更为清洁了.我们夜间睡在屋中,屋中温度较高,不好气味的有机物(器物中发出或人呼出)空气中也很多,所以一到树林中,凉爽而清洁的空气,眼界的开朗就使我们心神为之一振.(吴相钰、董愚得答)
Q: Green plants in the sun when the photosynthesis absorption of carbon dioxide release of oxygen, in the absence of sunshine at night only breathe oxygen absorption of carbon dioxide, why always say that morning walk to the woods good? A: Because the air flow is very powerful, So in the general woods O_2 and CO_2 changes during the day and night is minimal.That morning air is good, not the plants played a role, but because people stopped at night activities, the horse is not on the road Mercedes-Benz, the factory’s The chimney does not smoke.And with the humidity in the woods, the dust landed on the ground, the air is more clean.We sleep at night in the house, the house temperature is higher, bad smell organics (utensils issued Or people exhale) in the air is also a lot, so as soon as the woods, cool and clean air, the vision of the cheerful make us the heart of it. (Wu Xiang Yu, Dong fool answer)