全球变暖原因 英文

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.Some of the reasons for global warming, mainly divided into two aspects of both human factors and natural factors：

Human Factors：

1、Population factors

In recent years, the dramatic increase in population is one of the main factors that contribute to global warming. At the same time, it also seriously threatens the balance between natural ecological environment. So many people, only their own emissions of carbon dioxide each year will be a staggering Numbers, the result will lead to make the content of carbon dioxide in the atmosphere directly increase unceasingly, this form of carbon dioxide "greenhouse effect" will directly affect the earth's surface climate change.

2、Atmospheric environmental pollution factors

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

3、Marine ecological environment deterioration factors

At present, the change of sea level is continuously rising, according to experts predict the next century, sea level could rise 50 cm. If you don't take on the measures, will directly cause the destruction of freshwater resources and pollution. In addition, land activities to produce large amounts of toxic chemical waste and solid waste constantly into the sea; Major in sea water in the oil (leak) events and caused by human activities

such as coastal areas such as the destruction of the ecological environment is the main factor that leads to the ecological environment destruction.

4、Land erosion, salinization, desertification and other factors

Land erosion, salinization, desertification and other factors, human activities such as for wood and deforestation, cultivated land used for agricultural production and overgrazing reason, is still a serious damage to vegetation. The world per minute on average 20 hectares of forest are destroyed, 10 hectares of land desertification, 47000 tons of soil erosion. Soil erosion decreased soil fertility and water retention, thus reducing the biological productivity of the soil and its ability to maintain productivity; And can cause a wide range of floods and dust storms, causing great economic losses to the society, and the worsening ecological environment.

5、The forest resources in factors

Around the world, because of natural or man-made factors causing forest area is greatly reduced.

6、Acid rain harm factors

The effects of acid rain to the ecological environment has become more and more attention all over the world. Acid rain can destroy forest, acidification lakes, endanger biological, etc. At present, the acid rain in the world more concentrated in Europe and North America, most of the acid rain occurred in developed countries, some developing countries, acid rain, also in the occurrence and development rapidly.

7.、Factors accelerate extinctions