网址：www.jiazanmiaomu.com 2021-05-18 作者：admin 阅读：
In fact, we can also understand that today's cities are full of topics such as haze and pollution, and the topic of air pollution has been hot for a long time. People's lives consume oxygen every day, and many industries and electrical appliances emit carbon dioxide every day. If this consumption goes on, our living environment will be worse and worse, so we need all kinds of green seedlings, all kinds of green plants to maintain the ecological balance of our environment.
The oxygen produced by photosynthesis is 20 times more than that consumed by respiration, so forests and green plants are natural carbon absorption and oxygen production plants on earth. Some data show that the annual dust fall amount of 1 hm2 in many industrial cities is 5000 ~ 10000 kg. According to the estimation of Bai family, the forest of 1 hm2 can absorb 300 ~ 900 kg of dust in one year, and the dust reduction rate of green land is 37.1% ~ 60%. Plants can absorb and purify many harmful gases. According to the measurement, 1 m2 Cryptomeria fortunei can absorb 720 kg sulfur dioxide per year, and 1 kg Ailanthus altissima dry leaves can absorb 330 g sulfur dioxide per year.
In fact, farmers or experts can understand this problem better. The underground roots of plants can absorb a lot of harmful substances and have the ability to purify the soil. Moreover, we have heard that after a few years of planting corn in many fields, we will choose to plant different crops to make our soil better in order to make the soil fertility or composition better.