What are the forests that have been cut down by humans?

The large and small Khing'an Mountains were mainly cut down before and after --- liberation, and now they can basically no longer be called forests, but forests.

After the policy adjustment, China is now mainly cutting down forests in the southwest region, mainly in Yunnan and Guizhou, but it is estimated that it will not last for many years.

Of course, in ancient times, large areas of mangrove forests in Xinjiang have also disappeared due to excessive deforestation.

Throughout the ages, as long as there was a war in China, that number must have suffered, as depicted in the second part of The Lord of the Rings, trees are always necessary materials for war.

Look at the questions you ask, you know that you are an environmentalist, pay more attention to these issues, and contribute more to the future development of the world.

The effects of deforestation on humans are:

1. Indiscriminate deforestation will destroy the biodiversity of forests, and many organisms will lose their original habitats and become endangered.

2. Indiscriminate felling will homogenize local species and reduce the ability to resist pests and diseases, for example, where there are more plantations, pine caterpillars are prevalent.

3. Indiscriminate deforestation will reduce the ecological regulation function of the forest and reduce the air purification capacity of the forest.

4. Forests play an important role in maintaining soil and water, and indiscriminate deforestation will exacerbate soil erosion. Desertification of land, soil erosion, sandstorms, tornadoes and other natural disasters.

5. Quicksand accumulation and blockage of reservoirs. The Yellow River has the highest sediment content in the world, and when the flood comes, water and sand account for half each. Due to the siltation of quicksand, the riverbed in some places in the lower reaches of the Yellow River is 12 meters higher than the land outside the embankment, and even higher than the city wall of Kaifeng City, which seriously threatens the safety of people's lives and property.

Measures to protect the ecological environment:

1. Strengthen publicity and education: carry out education on environmental protection knowledge, put forward requirements and environmental protection measures for the environmental protection work of the project, and improve the environmental awareness and awareness of environmental protection of the employees participating in the construction.

2. Strictly implement the requirements of the design documents and the national and local regulations on environmental protection and soil and water conservation, and formulate the management system and measures for environmental protection of the project in accordance with the relevant national and local laws and regulations, and strictly comply with them.

3. Establish a post responsibility system for environmental protection work at all levels, and clarify responsibilities, that is, the leadership should focus on the comprehensive, the management should focus on the key points, and the implementation layer should focus on specific implementation. At the same time, a regular inspection system is established to inspect the construction environmental protection and soil and water conservation work every month, and to investigate and deal with problems in a timely manner and rectify them in a timely manner.

4. Adhere to the overall planning of environmental protection work and design and construction, reasonably arrange the construction sequence and time for synchronous operation, reasonably plan the construction land, reduce the impact on the environment, synchronize environmental protection and construction, and follow the restoration measures, protect the surface plants and drainage ditches outside the construction boundary during construction, and level and clean up and restore plants in a timely manner after construction, improve the drainage system and remove garbage.

5. Carefully protect the surface vegetation, do your best to maintain the plants, turf and trees within the construction limit, and maintain the removed turf for surface protection as much as possible. At the same time, the construction waste and domestic garbage are transported to the designated garbage disposal site for treatment to prevent escape and damage to animals and plants.

6. Strengthen the protection of air quality, and cover it tightly with tarpaulin when transporting cement and other materials that are easy to fly. Equipped with a special sprinkler truck, the construction site and transportation roads are often sprinkled and moistened to reduce dust.

7. Strengthen the protection measures for noise restrictions, and slow down and do not honk when mechanical vehicles pass through construction camps or adjacent residential areas. Arrange the construction operation time reasonably and reduce the frequency of vehicle entry and exit at night as much as possible.

Hazards: 1) Destruction of primary forest resources; 2) Failure to conserve water sources, resulting in a decrease in river flow; 3) the damage of drought and flood increases; 4) increased soil erosion; 5) Artificial exploitation of land after indiscriminate felling, resulting in the accumulation of harmful components such as herbicides and fertilizers, polluting water quality, and having long-term potential harm.

Too much carbon dioxide and too little oxygen are causing global temperatures to rise. The temperature can change, causing an unstable change in the climate. Desertification of the land.

Soil erosion. Animals don't have a home. There is a lack of oxygen**, and there is also a lack of natural filters.

The ecological environment has been forcibly occupied, and the laws of the ecological cycle have been destroyed. The waste from the trees is burned after they are cut down, causing environmental pollution (Indonesia is the epide).Farmers account for about half of the world's population that uses firewood as fuel.

Due to the large number of deforestation, there is a shortage of firewood in China's rural areas, which makes farmers use all organic energy sources, such as straw, straw, artemisia grass, etc., as fuelwood, so that organic matter can not be returned to the field, soil conditions deteriorate, and the rural ecological balance is destroyed. In arid areas, excessive deforestation is easy to cause desertification, and plants grow slowly in arid and desert areas, such as Qinghai Qaidam, a plant of ephedra with a DBH of 6 cm, which needs to grow for 50 to 60 years, and these trees are difficult to recover once they are cut down, and even become deserts or Gobi from then on. However, due to the increasing demand for fuelwood due to population development, the amount of deforestation has increased unabated, many natural drought-tolerant and cold-tolerant plants in arid desert areas are being depleted or even extinct at an alarming rate, and many areas in the north-west are rapidly desertifying, a phenomenon that will have dire consequences if not stopped.

Now, with the rapid progress of human life, more and more trees are being cut down. However, people only think about their immediate needs, and they do not know that cutting down trees will bring more harm to themselves. At the very least, the existence of trees also represents the existence of human beings.

Because we all know that people absorb oxygen and exhale carbon dioxide. Trees, on the other hand, are the absorbers of oxygen, the creators of oxygen. Because of the light and action trees can produce oxygen during the daytime.

If all the trees were cut down, the carbon dioxide would not disappear and oxygen would not be produced. In this way, the human race will gradually become extinct. In the past, trees can also excrete fungicides, kill bacteria around humans, and resist diseases for people.

Not only that, but if you cut down trees regularly, the world will slowly become desertified. There is a lack of oxygen**, and there is also a lack of natural filters. The ecological environment has been forcibly occupied, and the laws of the ecological cycle have been destroyed.

The temperature changes, causing an unstable change in the climate, and the waste of the trees that are cut down is burned, causing environmental pollution. The soil is loose, and when it rains, the water flows down from a high place. Landslides are more susceptible.