I make a popular science video and all the emperors learn from it!

[Popular science continues.] 】

[Popular science on the earth, the ten most precious natural resources!]

[Fourth place: forest resources. 】

[Forests are biomes dominated by woody plants. It includes arbor forests, bamboo forests and shrub forests under special national regulations. 】

[According to the use, it can be divided into shelter forest, special purpose forest, timber forest, economic forest and energy forest (original charcoal forest). 】

[The forest concentrates trees, plants, animals, microorganisms and soil, so that they are interdependent, mutually restrictive, and interact with the environment, thus forming an ecosystem as a whole. Forests are known as the "lungs of the earth" due to their abundant species, complex structures, and diverse functions. 】

【Features:】

[(1) Life cycle and succession series length. 】

[The main component of the forest - trees can live for decades, hundreds or even thousands of years. 】

[(2) Reproducibility. 】

[The forest itself is productive and can be renewed, and if it can be used rationally, it can realize the sustainable use of forest resources. 】

[(3) Wide range of distribution. 】

[Various types of forests formed by deciduous or evergreen and tree species with different characteristics such as cold tolerance, drought tolerance, salt and alkali tolerance or water and humidity tolerance, distributed in cold, temperate, subtropical, tropical mountains, hills, flatlands, and even swamps, tidal flats and other places. 】

[(5) High productivity. 】

[Due to the tall and multi-layered distribution of branches and leaves, the light energy utilization rate of the forest is 1.6%~3.5%, and the total energy fixed by the forest accounts for 63% of the total energy fixed by terrestrial organisms every year, and the biological yield of the forest is the largest among all plant communities, which is the largest storage of natural physical energy. 】

[(6) Many uses, great benefits. 】

Forests can continue to provide a variety of forest products, such as timber, food, chemical and pharmaceutical raw materials. 】

At the same time, forests also have great ecological and social benefits in conserving water sources, improving water quality, maintaining water and soil, mitigating natural disasters, regulating temperature and humidity, purifying the air, reducing noise, beautifying the environment, and protecting wild animals and plants. 】

[Value:]

[1. Social value. 】

[1. Forests and human health. 】

[The green environment can reduce the secretion of 143 adrenaline in the human body to a certain extent, and reduce the excitability of the sympathetic nerve in the human body. 】

[It can not only make people calm and comfortable, but also reduce the skin temperature of the human body by 1~2, reduce the pulse by 4~8 times per minute, and enhance the sensitivity of hearing and thinking activities. 】

[Plants in the forest, such as cedar, pine, eucalyptus, poplar, juniper, oak, etc., can secrete a kind of aromatic monoterpene, sesquiterpene and diterpene gas "fungicide", which can kill diphtheria, typhoid, tuberculosis, dysentery, cholera and other germs in the air. 】

[According to the survey, in dry and forestless places, there are 4 million germs per cubic meter of air, while in the boulevard there are only 600,000, and in the forest there are only a few dozen. 】

[The photosynthesis of green plants can absorb carbon dioxide, release oxygen, and absorb harmful gases. 】

[According to scientists' research, there is a substance in forests and fields that is extremely beneficial to human health - negative ions. 】

It can promote the body's metabolism, make breathing stable, blood pressure lower, energetic and improve the body's immunity. Some people have determined that there are only forty or fifty negative ions per cubic centimeter in urban houses, one or two hundred in the shade of trees, and more than 10,000 in forests, valleys, grasslands, etc. 】

[2. Improve the living environment of human beings. 】

[The fluff on the leaves, the secreted mucus and oil, etc., have a strong adsorption and filtration effect on dust particles. 】

[In urban green belts, the dust content of the air is generally less than half of that of non-green belts. 】

[Trees absorb noise. A 40-meter-wide forest belt can reduce noise by 10~15 decibels. 】

【...】

[3. Provide resources.] 】

[Our ancestors first lived in the forest. 】

[They feed on gathering wild fruits, catching birds and beasts, making clothes from leaves and animal skins, and building nests on branches to make houses. Forests are the home of human beings, and it is here that human beings originated and developed. 】

To this day, forests still provide us with a variety of resources necessary for production and life. 】

[An estimated 300 million people in the world live in forests and depend on them for their livelihoods.] 】(chei）

Forests provide a variety of foods, including fruits, seeds, nuts, roots, tubers, fungi, etc., and in some forestry areas of the country, 60% of the food is taken from the forest. Animals in the forest bushes also provide people with meat and animal protein. 】

[Wood has a wide range of uses, such as building houses, opening mines, building railways, building bridges, making paper, making furniture, ......]

Forests provide employment for millions of people. 】

[Other forest products are also rich and colorful, such as pine resin, baked gum, shellwax, spices, etc., which are all raw materials for light industry. 】

[The Chinese and Arab countries have used medicinal plants for 5,000 years, and most of the world's medicinal materials are still obtained from plants and forests. 】

[In developed countries, 1/4 of the active ingredients in pharmaceuticals come from medicinal plants.] 】

Fuelwood is the main fuel in some developing countries, and about 2 billion people in the world rely on firewood and charcoal for cooking. 】

[4. Provide habitat. 】

[Forest is the habitat of a variety of animals, but also the growth of many kinds of plants, is the most active area of the earth's biological reproduction. 】

[2. Natural value. 】

[1. The forest is the "dispatcher" of nature. 】

It regulates the circulation of air and water in nature, affects climate change, protects the soil from wind and rain, and reduces the harm caused by environmental pollution. 】

[Forests are the "lungs of the earth", and every tree is an oxygen generator and carbon dioxide absorber. 】

【......】

[2. Forests can conserve water and are a huge "reservoir" that plays an important role in the natural cycle of water. 】

["The green mountains are always there, and the clear water flows forever", and the tree is always associated with water. 】

【......】

[3. Forests can prevent wind and fix sand and stop soil erosion. 】

[When the wind blows, it blocks the way with the canopy of the tree, reduces the wind speed, and the roots of the tree are long and dense, grabbing the soil and preventing the wind from blowing away. Heavy rain falls into the forest, seeps deep into the soil and crevices in the rocks, and flows out slowly in the form of groundwater, which cannot wash away the soil. 】

[4. In addition, forests also have the role of regulating the microclimate. 】

[It has been determined that the temperature in woodlands is 3 - 5 months lower than in non-woodlands during the hot summers.] 】

【...】

[5. Forests are also buffers for controlling global warming. 】

[Due to the massive use of fossil fuels by modern humans and the large-scale reduction of forests, the concentration of carbon dioxide in the atmosphere has increased rapidly, resulting in a "greenhouse effect" and a trend of global warming. 】

The consequences of the greenhouse effect are staggering. 】

[First, it will cause changes in rainfall patterns. Second, it will lead to sea level rise. The third is that it will cause many of the plant communities currently growing on land to die due to changes in temperature. 】

[Such changes will further promote the rise of temperatures, forming a vicious circle of ecosystems on a global scale.] 】

[If there were no forests, the vast majority of life on land would be extinct, the vast majority of water would flow into the ocean, the oxygen in the atmosphere would decrease, carbon dioxide would increase, the temperature would rise significantly, and floods and droughts would occur frequently. 】

【.......】

[Utilization Protection:]

Forest resources are limited, and unreasonable deforestation will cause ecological disasters. 】

[According to the characteristics of forest resources and the conditions of regional economic development, it is necessary to formulate plans for the development and utilization of forest resources, and rationally arrange the structure and layout of forestry production. The second is to formulate laws and regulations to protect forests, implement the rule of law in forests, severely punish indiscriminate deforestation, and limit the amount and method of harvesting. 】

【......】

[Pay attention to fire prevention. 】

[Fire prevention policy and fire fighting principle: forest fire prevention implements the policy of "prevention first, active elimination". 】

[Doing a good job of prevention is a prerequisite for preventing forest fires, and the principle of fighting is: fight early, fight small, and fight. Forest fire fighting steps According to the law of forest fire occurrence and the characteristics of fire fighting, forest fire fighting must follow the procedure of "first control, then elimination, and then consolidation", and be carried out in stages. 】

[(1) Fire control stage. That is, the initial stage of extinguishing the fire, which is also the most urgent stage of extinguishing the fire. Its task is mainly to block the fire, control the fire, and limit the fire to a certain range. 】

[(2) Stabilizing the fire stage. After blocking the fire and controlling the fire, it is necessary to take more effective measures to extinguish the fire wings (both sides of the fire) to prevent the fire from spreading to both sides, which is the most critical stage of fire fighting. Once the fire has been extinguished, patrol the burned area and extinguish the embers as soon as they are found. (Read the violent novel, go to the Feilu Novel Network!)

[(3) Guarding the fire stage. The main task is to guard the fire with those left behind. Generally, barren mountains and young woodlands should be on fire for 12 hours, and middle-aged woodlands should be on fire for more than 24 hours before they can be considered to evacuate to prevent the recurrence of embers. 】

【......】

【Distribution of forest quantity:】

[At the beginning of the 21st century, the world's forest area was 3.45 billion hectares, accounting for about 1/4 of the total land area of the earth. 】

[The distribution of the world's forests is:]

[Europe (including the woolly bear country) has the largest forest area, with 930 million hectares, accounting for 27.0% of the world, with a forest coverage rate of 41.3% and a per capita forest area of 3 hectares;]

[Followed by South America, with a forest area of 870 million hectares, accounting for 25.2% of the world, a forest coverage rate of 49.7%, and a per capita forest area of 2.7 hectares;]

[The third is North America and Central America, with a forest area of 5.4 hectares, accounting for 15.5% of the world, a forest coverage rate of 25.5%, and a per capita forest area of 1.2 hectares;]

【......】

[The fifth is Asia, with a forest area of 500 million hectares, accounting for 14.5% of the world, a forest coverage rate of 16.4%, and a per capita forest area of 0.1 hectares;]

【......】

"Hey, I didn't expect that what I usually see and use is the most important thing. "

I'm a woodcutter, so I make a living by going up the mountain to chop wood. "

"I'm the same! I'm a hunter, and I live on the forest. "[]

"Who isn't, we doctors often go to the forest to pick herbs. "

"Don't make any noise, haven't you found the crux of the problem? Even the forest resources, we don't have the most!"

I don't know who said it.

The ancients who sighed before were directly stupid!

Oh, even the forest, we don't have a number!

According to the previous popular science, Huaxia is located in Asia......

Numb, destroy!

Qin Dynasty.

Ying Zheng kept being surprised by this.

He really didn't think that the unnoticed forest would play such an important role.

It's no wonder that every time you enter the forest, you feel cool and comfortable.

He looked around again.

He sighed regretfully: "It's a pity that the palace can't plant too many trees. "

This was done to prevent the Assassins from hiding in the woods to assassinate.

Therefore, even if there are trees in the palace, they will not be too tall, let alone too densely planted.

Ying Zheng pondered for a while and thought of a solution.

Just because you can't plant trees doesn't mean you can't plant other plants.

It's all about the same effect.

Ying Zheng looked around, thinking about where to be, and a variety of flowers and plants.

Ming dynasty.

Zhu Yuanzhang suddenly realized.

"Let's just say, when I went into the woods, I suddenly felt a chill. "

After looking at the value of forests.

He understood a lot of questions that he couldn't figure out before.

Since forests are so important, even in fourth place, they must be well protected.

Zhu Yuanzhang was interested, and immediately drafted the Ming Dynasty's tree protection law.