What is the reason for the continuous decline of the earth s forest area?

Some time ago, the United Nations released an assessment report on global forest resources, which pointed out that in the past 30 years, more than 100 million hectares of biological habitat on the earth have been destroyed, which has directly caused the decline in the number of animals and plants and the number of species. In addition, the report also pointed out that the emergence of human beings in the past 30 years has led to the loss of nearly 100 million hectares of the earth's forest area, and it is foreseeable that if this trend continues, mankind will face a serious forest resource shortage crisis in the future. So what is the reason for the declining forest area?

Presumably, many friends can think of one of the answers, and that is human logging. Deforestation has occurred in almost every country over the past three decades, but not all countries are declining. In the past five years, the forest area in Asia has been increasing, which shows that Asian countries attach great importance to the protection of forest resources.

On the contrary, the African region and South America.

Tree felling is evident in the region, resulting in a decrease in forest cover on both continents.

In the assessment report published at the United Nations, there is a data that shows on five continents.

Africa has the highest rate of annual forest loss, mainly due to the large-scale exploitation of forests by businessmen from other continents. South America, which relies on the Amazon rainforest, has the second highest rate of forest area loss.

It is said that in the past, the state did not interfere with private logging, but in recent years, there have been more and more orders prohibiting the felling of trees.

It is not only human factors that are causing the loss of the Earth's forest area, but also natural factors. There are many ways in which nature can reduce forest resources, such as soil erosion, floods and fires, with fires being the most severe. Last year in South America and Oceania.

There were two large-scale fires in both cases, namely the Amazon Fire and Australia.

Hill fires. After investigation of the accident, both accidents are likely to be caused by the weather, in the hot and dry climate, some flammable vegetation in the forest is the first to "attack", if the fire is not detected and controlled at the beginning, it may cause a large-scale fire.

The United Nations also summarized the loss of forest resources caused by fires in its assessment report, and the world's largest forest fires in the past five years.

Two-thirds of it occurs in Africa and South America, and in the tropics.

The frequency of occurrence is much higher than in other climatic zones, suggesting that climatic factors can also take a toll on forest resources. But if we dig deeper into the causes of natural factors, it ultimately comes down to human factors.

If it weren't for humanity to let the greenhouse effect.

As it gets worse, the Earth's climate is unlikely to continue to warm and cause most forest fires. Today's human impact on the environment is much greater than it was a hundred years ago, but we need to think about whether the impact is conducive to the sustainable development of human civilization.

Go down, otherwise end up with the natural environment.

The effects will have a negative effect on humans.

The main reason for the continuous decline of the earth's forest area is human activities, and the other is also due to the frequent occurrence of some natural disasters, which together lead to the continuous decline of the earth's forests.

It is caused by the continuous cutting down of trees by human beings, and the development of human society has increased the demand for trees as raw materials. So more and more forests are being cut down.

1.Reduced air purification capacity. With the rapid development of industrial and mining enterprises and the sharp increase in the use of fossil fuels in human life, the polluted air is mixed with a certain amount of harmful gases, which threaten human beings.

Among them, sulfur dioxide is a widely distributed and harmful harmful gas. All living things have the ability to absorb sulfur dioxide, but the rate and capacity of absorption are different. Plants have a large leaf area and absorb more sulfur dioxide than other species.

According to measurements, sulfur dioxide in forest air is 15-50 lower than in open land. If it is a hot and humid summer, the forest will absorb sulfur dioxide more quickly with the strenuous physiological activity of the forest. When the relative humidity is higher than 85, the rate of sulfur dioxide uptake by the forest is 5-10 times higher than that of the relative humidity of 15.

The easiest and most effective way to feed your stomach is to plow. Moreover, in view of the limitations of the feudal system, which led to the extremely weak development of agricultural technology, the lack or disappearance of a large amount of land and forest resources of large landlords is undoubtedly a regret for mankind, and a kind of soil erosion, the intensification of desertification, the destruction and destruction of the environment, and the occurrence of a series of natural disasters such as sandstorms and landslides are all serious problems.

<> decline of forest resources is also an inevitable trend. As long as our population continues to increase many times over, the area of forests will inevitably decrease. Less forest area on Earth means less oxygen we humans need.

In fact, such an explanation can be said to be the result of constant thinking. The results were wrong. -Why?

Caring for the environment has become the responsibility of our generation, and we must set an example in protecting the environment and setting an example for future generations, ensuring the sustainable development of humanity and reducing nature's revenge on humans. Environmental protection is to implement the four comprehensive strategic guidelines, to build a well-off society with people's well-being as the core, we must protect the environment, create more favorable conditions for their survival, and ensure the sustainable development of mankind.

Global forests cover about the entire Earth's surface, that is, the total area of the world's forests. Nearly 38 million people live below the poverty line. square metre (a) As at 31 December 2007, the area was covered by 10 million square kilometres, or 20 million square kilometres.

With the exception of forests, the rest of the area is mainly located in grassland and desert natural areas, and if the forest area were doubled, the forest area would reach 76 million square kilometres.

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The world's forest area has decreased by 100 million hectares, and the reason for this decline is of course due to over-harvesting.

The world's forest area has been reduced by about 100 million hectares. Because of the rapid population growth between 1980 and 1995, population growth required land expansion and deforestation.

The world's forest area has been reduced by 100 million hectares. Because sometimes a lot of people cut down a lot of trees, and the dissolution of the natural environment will also lead to desertification, so the forest area will be reduced a lot.

The world's forest area has been reduced. 100 million hectares, of course, is due to human over-harvesting, so the current results have been formed.

Without forests in the world, life on land will be reduced by 90%; There will be 2 3 fewer oxygen in the air, and 2.5 million biological species will go extinct. If there are no forests on the earth, there will be a shortage of resources, less fuel, soil erosion, wind and sand, and drought and flood. The purpose of deforestation is to increase arable land and produce more food, but the result is counterproductive, crops are reduced, and more and more hungry people are in the world.

Without forests, the land is desertified, desertification is serious, soil erosion is serious, and sandstorms are serious.

Blowing sand is raging, and grasslands and arable land are decreasing. Forests are biomes dominated by woody plants and are concentrated trees.

It is an ecosystem that is interdependent and mutually restrictive with other plants, animals, microorganisms and soils, and interacts with the environment.

Overall. <>

Forests are rich in species, complex structures, and diverse in function. Forests are known as the "lungs of the earth". Due to the tall and multi-layered distribution of branches and leaves, the forest has a light energy utilization rate, 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 material energy.

Forests provide a continuous supply of a variety of forest products, such as timber, food, chemicals and pharmaceutical raw materials. Forests conserve water sources, improve water quality, conserve soil and water, and mitigate natural disasters.

Ecological and social benefits in regulating temperature and humidity, purifying the air, reducing noise, beautifying the environment, and protecting wildlife.

It's also huge. Deforestation is aimed at getting more timber and fuel, but the result is that less timber is being cut down, and some countries with abundant forest resources have become timber importers, and 100 million people in 22 countries do not have enough trees to meet their minimum fuel needs.

Forests are closely related to human beings, close partners of human beings, and an important part of the global ecosystem. The destruction of forests is the destruction of the natural environment on which human beings depend.

Destroying the global ecological balance.

It affects everything from the food we eat to the air we breathe. Nature is amazing, it keeps things in balance, like a food chain.

The higher the level, the lower the fecundity, and if the balance is lost, there will be other remedies. In the face of a certain thing, there will always be two aspects of promoting and inhibiting the existence, and once the link is broken, another equilibrium will be reached.

There will be a lot less life on land, because many of them depend on forests for their survival.

It will be reduced by more than half, most of the land creatures are dependent on living creatures to survive in Changna, if there is no forest, the bird song represents the ** without food, most of the creatures will disappear.

More than 30%, if there are no forests on the earth, then many animals and many plants will disappear, and the number of human beings will not be very large.

The functioning of the ecosystem will be greatly improved. Ecological functions will fully reflect the great improvement of the environment. The material circulation capacity will be greatly improved, the greenhouse effect will be greatly alleviated, environmental pollution will be effectively curbed, biological species will be greatly reproduced, natural disasters will be significantly reduced, and people's lives will be prolonged.

Man and nature live in harmony, and the clear water and green mountains are invaluable assets. Then the weight will increase, then the stress of the person will inevitably increase, you will feel a sudden increase in the weight of the body, and some people will even feel that it is difficult to walk. In the long run, it will cause great changes to the bones of the human body, and the impact on human beings is still great.

<>As a result, the Earth's atmosphere will thicken, exacerbating the already serious greenhouse effect on Earth. What's even more terrifying is that drastic changes in the atmosphere will cause the earth's environment to begin to change drastically, forming very fast storms that will cause damage to the earth's surface, which will truly become a global disaster. The animals and plants on Earth may be restored to what the green earth looked like hundreds of years ago.

The vegetation on the planet will gradually return to its previous levels, plant diversity, fauna and flora will return to its previous ecological level. Some creatures specialize in feeding principles, such as swallows only eat flying insects, not insects that fall to the ground.

The negative oxygen ions on the earth increase, the air is fresher, bathed in nature, breathing fresh air, and the body and mind are very comfortable. We should protect nature. Only by protecting nature can people live longer and healthier.

Of course, there are forests in ancient times, otherwise we have a lot of coal from the first generation today, except for herbivores on the earth, most of the impacts on the forest are spontaneous fires, fire is the main factor in accelerating forest regeneration, so there will be layers of reach, the destruction of forests and the impact of human society is mainly modern serious, the industrial revolution is very serious damage to nature, and the current forest coverage rate is ten times that of the past, and many houses, mines, and roads will disappear.

If the area of forests on the earth were to be doubled, the amount of oxygen on the planet would also increase, many species would be able to live in a better environment, the area of human activities would be reduced, many endangered species would be better protected, and the air quality would be better.

If the area of forests on the earth is doubled, the oxygen content on the earth will also increase a lot, the organisms that live on the earth will also change, the pressure on the earth will also change, the environment of the earth will become better, and the humidity will also increase.

The air on the earth will become very good, the earth's greenhouse effect will be reduced, the desertification of the soil will be reduced a lot, people will not be less susceptible to diseases, the rainfall will increase, and the oxygen will increase.