What is the impact of humans changing the surface on the earth

The harm of human beings to nature is relatively large, which is manifested in the following aspects:

1.The over-expansion of human populations has fatally squeezed the living space, living conditions and survival resources of other species, and the decline or extinction of these species will bring about a series of chain reactions. For example, there were tigers in Shandong back then, the so-called Wusong fighting tigers, and now it is very difficult to see wild tigers in China, and only the populations that may exist in the northeast, Fujian, and Hainan.

But now you can't find a tiger in Shandong, because the place is occupied.

2.In the process of consuming resources, human beings have changed the natural and healthy material cycle, polluted the environment, and led to the destruction of the living environment of other species, including human beings. Originally, there were not so many pollutants on the earth, and they also had their own degradation ability.

Now that man is so mixed up, the rate and quantity of pollutants discharged into nature far exceed the capacity of nature. For example, the rate of greenhouse gas emissions exceeds the rate of metabolism of the earth itself, such as CO2.

3.Human beings have changed a series of ecological processes on the earth for their own enjoyment, including the water cycle. For example, the normal water cycle travels from the sea to the land and returns to the sea in the form of surface runoff, which enables the exchange of nutrients, the water cycle and climate regulation, and supports a large number of biological species.

However, man-made projects such as dams, lake reclamation, and cement cities have disturbed the natural hydrology of rivers and lakes, and their ability to degrade pollutants and regulate and store has been affected. Another example is the farmland ecosystem, where the intervention of pesticides makes natural enemy species more susceptible to extinction and pest species outbreaks.

4.Human beings have changed the energy balance of the earth, because all natural resources are eventually converted into heat energy, such as media, electricity, oil, etc., and finally consumed and released to produce heat, but because of greenhouse gases, these heat cannot be dispersed in time, accelerating the greenhouse effect. It should be cold in winter, but people burn the heat, not a few firewoods, but large-scale heating; It should be hot in the summer, but people use air conditioners, and in the process of using air conditioners, a lot of heat is generated.

In short, human beings have an unshirkable responsibility for the deterioration of the earth's natural environment. And at the root of it all is the ever-expanding human population. Europeans and Americans are environmentally friendly, but they consume more than half of the world's resources, while other third world countries and developing countries can only continue to destroy the environment under poverty.

So at the moment, it is more realistic to control population growth. But it's a long way to go.

What extent do you refer to the earth? The surface of the earth includes the natural biosphere, geological structures, resources and environment!!

So far, human alteration of the natural biosphere has caused a major crisis for the planet, with biological degradation and species extinction. In terms of geological structure, there are damage to the direction of rivers, such as indiscriminate construction of dams and reservoirs, resulting in the inability of organisms to return to reproduction, the reduction of downstream water volume, desertification of land, and difficulty in drinking water. In terms of resources and environment, a large number of minerals, groundwater, etc., have caused surface subsidence, and people's lives are facing a crisis.

1. Positive effect: human beings have changed a large number of natural ecosystems into agricultural ecosystems through reclamation and breeding activities, and cultivated edible wild plants into crops, which has met the needs of rapidly increasing population growth; Agricultural soils that have been cultivated over a long period of time in terms of traits and fertility are superior to those of natural soils; The mechanical transport of surface and near-surface materials by human beings has changed the landform, and man-made projects such as water conservancy construction have changed the temporal and spatial distribution of surface water, affecting the hydrological process and erosion and sedimentation process of rivers.

2. Human activities have a positive impact on the surface environment and a negative impact. For example, agricultural development inevitably destroys forests and grasslands; Hunting, gathering animals and human changes to their living environment accelerate the extinction of species, and the destruction of the original landform usually leads to the weakening of land surface stability and the increase of erosion intensity. Irrational irrigation and tillage lead to secondary salinization of soil, change soil porosity and infiltration capacity, and aggravate soil erosion and land desertification.

1 Mode of action and effect on surface morphology:

1) Weathering: The destruction of rocks under the influence of temperature changes, water, atmosphere and biological processes, and the weathering produced by the action remains on the surface to form a weathering crust.

2) Erosion: the destructive effect of wind, flowing water, glaciers, oceans, etc. on surface rocks and their weathered materials, resulting in the formation of wind erosion depressions, wind erosion columns, and wind erosion mushrooms on the surface; widen and deepen the valley and riverbed, and break the slope surface; And it can form karst, cirque, horn peak, U-shaped valley, sea erosion and other terrains.

3) Transport: The products of weathering and erosion are transferred by wind, flowing water, glaciers, waves, etc., and leave their original positions.

4) Sedimentation: The products of rock weathering and erosion are gradually deposited during the transportation of external forces, with the decrease of wind speed and flow speed, and the melting of glaciers. The main sedimentary terrain is delta, alluvial plain, desert, loess, moraine terrain, etc.

5) Consolidation diagenesis: sediments undergo physical, chemical and biochemical changes and releases into hard rocks.

2 The impact of human activities on the surface morphology: Changing and shaping new surface morphology according to the laws of nature. For example, land reclamation, river excavation, reservoir construction, desert greening, etc.

Contrary to the laws of nature, the surface form is destroyed. For example, the expansion of desertification, soil erosion, etc.

1.Changed the Earth's climate.

2.Cause certain damage to the ecological environment.

3.Moving mountains and reclaiming the sea is the surface of the earth.

Dig canals and change the course of the river.

Summary. Hello, it is a pleasure to serve you - man discovers the changes of the earth from fossils, fossils are witnesses of history, it helps us to understand the development process of the earth's history.

Hello, it is a pleasure to serve you - man discovers the changes of the earth from fossils, and Na Zheng fossil is a witness to history, which helps me to understand the development of the earth's history.

For example, fossils of a marine creature, the trilobite, have been found in many places. It tells us how vast the Earth's oceans were during the Cambrian period, about 600 million to 500 million years ago. Many fossils of tall trees tell us that there was a time when the Earth's climate was warm and humid, which was characteristic of an era called the "Carboniferous".

There are also some "elephants" and "rhinoceros" that have grown long hairs, which must be the cold weather, indicating the advent of the "Fourth Age" ice age. Certain activities in nature that disappear in the blink of an eye also leave traces on the stones. The remains of the rain hitting the beach, the ripples of the mud and sand caused by the water waves leaking cherry blossoms, the footprints of ancient animals and the image of the soil cracking during the drought.

How did people put dinosaur fossils together?

Hello, it is a pleasure to serve you - Step 1: Put on your goggles and put on a silver tablecloth, Step 2: Dig out the dinosaur fossil from the clod with a tool, and clean it with a brush, Step 3: Combine the dinosaur's skull and the vertebrae, then install the upper and lower frontal bones, Step 4: Install the rib frame on both sides of the spine, then install the two forelimbs, Step 5: Install the two hind limbs on both sides of the lower ribs, and then install the tail.