The natural environment in which we live is the surface of the earth. The atmosphere, hydrosphere and lithosphere are composed of air, water and rocks (including soil). The intersection of these three circles is the biosphere of living things. Under the action of solar energy, these four circles carry out material circulation and energy flow, so that human beings (creatures) can survive and develop.
according to
According to scientific measurement, the proportion of more than 60 chemical elements in human blood is very similar to that in the earth's crust. This shows that man is the product of the environment. The relationship between people and the environment is also reflected in people's things.
There is an exchange relationship between quality and substances in the environment. For example, the human body inhales oxygen through metabolism and exhales carbon dioxide; Drinking clean water and eating rich food maintain the development, growth and inheritance of the human body, which makes
The substance of the human body exchanges with the substance in the environment. If this balance relationship is broken, it will endanger human health.
In order to survive and develop, human beings have to ask for resources from the environment. In the early days, due to the small population,
Human beings have no obvious influence and destruction on the environment. For a long time, natural conditions have dominated the fate of mankind. In the era of slash-and-burn cultivation, human beings began to destroy themselves in order to feed themselves and survive and develop.
Forest reclamation has destroyed the environment to some extent. As a result, environmental problems caused by human factors have emerged. However, due to the low level of productivity at that time, the impact on the environment was not great.
During the industrial revolution, human beings
After learning to use machines, productivity has been greatly improved, and the impact on the environment has also increased. By this century, the ability of human beings to use and transform the environment has never been improved, and the scale has gradually expanded, creating huge material wealth. It is estimated that
Calculated, the agricultural products obtained by modern agriculture can feed 5 billion people, while the green plants produced by photosynthesis and the animals they feed on the original land can only provide food for 10 million people. It can be seen that human beings have gradually placed themselves in the environment.
In a dominant position.
However, serious environmental pollution and ecological destruction have also appeared in front of human beings. Air pollution is serious, water resources are in unprecedented shortage, forests are destroyed, cultivated land is reduced, a large number of species are on the verge of extinction, and the natural environment on which human beings depend is in crisis. The deteriorating environment has put forward to mankind that protecting nature and maintaining ecological balance are the most urgent problems today.