Why is it getting hotter and hotter now?

The reason why the weather is getting hotter and hotter

human factor

1. Population explosion factor

The rapid population growth in recent years is one of the main factors leading to global warming. At the same time, it also seriously threatens the balance between the natural ecological environment. Such a large population only emits its own carbon dioxide every year.

This will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere. The carbon dioxide "greenhouse effect" thus formed will directly affect the climate change on the earth's surface.

2. Atmospheric environmental pollution factors

At present, the increasingly serious environmental pollution has become a major global problem, and it is also one of the main factors leading to global warming. Now, the research on global climate change has clearly pointed out that the temperature of the earth's surface has started to rise since the end of last century.

3. Deteriorating factors of marine ecological environment

At present, the change of sea level is on the rise. According to the prediction of relevant experts, the sea level may rise by 50 cm by the middle of the next century. If no measures are taken, it will directly lead to the destruction and pollution of fresh water resources and other adverse consequences. In addition, a large number of toxic substances are produced in land activities.

chemistry

Waste and solid waste are continuously discharged into the sea; Major oil spills in seawater and the destruction of coastal ecological environment by human activities are the main factors leading to the destruction of seawater ecological environment.

4. Destructive factors such as land erosion, salinization and desertification.

The main cause of soil erosion and desertification is improper agricultural production. As we all know, good vegetation can prevent soil erosion. But so far, human activities, such as obtaining wood,

Excessive deforestation, land reclamation for agricultural production and overgrazing are still seriously damaging vegetation. At present, on average, 20 hectares of forests are destroyed, 65,438+00 hectares of land are desertified and 47,000 tons of soil are eroded every minute in the world. Soil erosion reduces soil fertility and water retention, thus reducing soil biological productivity and its ability to maintain productivity; It may also lead to large-scale floods and sandstorms, causing huge economic losses to society and deteriorating the ecological environment.

5. Factors of sharp decline of forest resources

Worldwide, due to natural or man-made factors, the forest area is decreasing sharply.

6. Hazard factors of acid rain

The influence of acid rain on ecological environment has attracted more and more attention all over the world. Acid rain will destroy forests, acidify lakes and endanger living things. At present, most of the acid rain in the world is concentrated in Europe and North America, and most of them occur in developed countries and some developing countries. Acid rain is also occurring and developing rapidly.

7. Factors accelerating species extinction

Life on earth is a precious resource for human beings and life.

Diversity is the foundation of human survival and development. But at present, the biological species on the earth are disappearing at an unprecedented rate.

8. Water pollution factors according to the global environmental monitoring system, water quality monitoring.

The project shows that about 10% of the monitored rivers in the world are polluted. Since the beginning of this century, the water consumption of human beings has increased dramatically, and the scale of water pollution is also expanding.

Formed a pair of contradictions between fresh water supply and demand. Therefore, the treatment of water pollution will be very urgent and important.

9. Toxic waste pollution factors

More and more toxic chemicals not only pose a threat to human survival.

Serious threat, but also will bring harm to the ecological environment on the surface of the earth.

natural cause

1. Volcanic activity.

2. Periodic orbital changes of the earth.

The periodic orbit of the earth changes from ellipse to circle.

Shape trajectory, closer to the sun. According to a scientist's research, there is a certain rule that the temperature of the earth changes alternately between high temperature and low temperature.

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