Information on climate warming, what are the main causes of climate warming

Greenhouse gases 1Factors of population growth.

The rapid increase in population in recent years is one of the main factors contributing to global warming. At the same time, it also seriously jeopardizes the balance between the natural ecological environment. With such a large number of people, the amount of carbon dioxide emitted by itself every year alone will be a staggering figure, and as a result, the amount of carbon dioxide in the atmosphere will continue to increase, and the resulting carbon dioxide "greenhouse effect" 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. Research on global climate change has now clearly indicated that the temperature of the Earth's surface has been rising since the end of the last century.

3.Factors for the deterioration of the marine ecological environment.

At present, the change in sea level is on a continuous upward trend, and according to relevant experts**, sea level may rise by 50 cm by the middle of the next century. If measures are not taken, it will directly lead to the destruction and pollution of freshwater resources. In addition, a large amount of toxic chemical waste and solid waste generated by land-based activity sites are continuously discharged into the ocean; Major oil spills (leaks) in seawater and the destruction of the ecological environment in coastal areas caused by human activities are the main factors leading to the destruction of the seawater ecological environment.

4.Land erosion, desertification and other destructive factors.

5.Factors for the sharp decline of forest resources.

Worldwide, forest areas are declining dramatically due to natural or man-made factors.

6.Acid rain hazards.

The impact of acid rain on the ecological environment has attracted more and more attention from all over the world. Acid rain can destroy forests, acidify lakes, endanger life, etc. At present, the world's acid rain is mostly concentrated in Europe and North America, most of the acid rain occurs in developed countries, some developing countries, acid rain is also occurring and developing rapidly.

7.Factors that accelerate the extinction of species.

Organisms on the earth are a precious resource for human beings, and biological diversity is the basis for human survival and development. But at present, the biological species on the planet are disappearing at an unprecedented rate.

8.Water pollution factors.

According to the Global Environmental Monitoring System (GEMS) water quality monitoring project, about 10% of the world's monitored rivers are polluted, and since the beginning of this century, human water consumption is increasing dramatically, and the scale of water pollution is also expanding, which creates a contradiction between the supply and demand of fresh fresh water. It can be seen that the treatment of water pollution will be very urgent and important.

9.Toxic waste pollution factors.

The growing number of toxic chemicals not only poses a serious threat to human survival, but also harms the ecological environment on the earth's surface.

Climate warmingThe main reasons are: carbon oxide,Methane, chlorofluorocarbons and other "greenhouse gases" emissions.

It is an indisputable fact that the contemporary global climate is warming. Professor Zhou Yongzhang believes that rising temperatures are not only human factors, but also natural factors. However, there are still differing understandings in the scientific community about the causes and possible consequences of contemporary climate warming.

Regarding the causes of contemporary climate warming, mainstream scientists at home and abroad agree that the greenhouse effect is mainly caused by human activities.

caused. However, there are also scientists in the world who believe that the increase in solar radiation in the past 30 years cannot be ignored.

The iceberg melts

Scientists have found that if global temperatures continue to rise, melting Arctic icebergs will release large amounts of toxic chemicals that are trapped in ice and cold water. Researchers warn that the large quantities of these poisons that accumulate in the polar regions are unknown, and their release will seriously endanger marine life and human habitat. These chemicals that will leach include the pesticides DDT, chlordane, etc.

The bridge spike has these persistent organic pollutants Zen bark and may cause cancer.

and birth defects, previously captured by the ice and frozen water of the Arctic. But Norway.

And Canadian scientists found global warming when monitoring measurements of organic pollutants in the air in 1993 and 2009.

Another study on global warming is even more surprising to the Mints, as a result of melting Arctic ice sheets, increased rainfall, and changing wind patterns, large amounts of fresh water are flowing into the North Atlantic, damaging the Gulf Stream and cutting off the North Atlantic Current. It is these warm currents that carry warm surface water from the Caribbean Sea to northwestern Europe and create a warm climate in Europe. Once the North Atlantic Current is cut off by global warming, the temperature in northwestern Europe may drop by as much as 5.8, and Europe may face a new ice age.

Answer]: B The first step is to determine the logical relationship of the question stem.

"Climate" and "warming" will lead to an increase in the "temperature", and "climate" and "warming" belong to the subject-verb relationship, and they belong to the corresponding relationship with "temperature".

The second step is to identify the options.

Item A: "Survival" and "development" belong to the juxtaposition of the relationship and exclusion;

Item B: "Polar ice" and "melting" will lead to the decline of "ice", and "polar ice" and "melting" belong to the subject-verb relationship, and they belong to the corresponding relationship with "ice", which is consistent with the logical relationship of the question stem.

Item C: "Protection" and "environment" belong to the verb-object relationship and are excluded;

Item D: "Cluster head gas" is a noun, which cannot form a subject-verb relationship with "greenhouse" and is excluded.

So, choose option B.

1. Solar activity: Some experts believe that the current climate warming is related to the solar cycle, and has little to do with human activities. Russian scientists believe that the warming cycle of Mars and Earth coincides, and the main reason is the sun.

2. Cloud cover reduction horizon: Changes in solar activity will change the cloud cover over the earth, amplify the sun's impact on the earth, and thus affect climate change. They speculated that cosmic rays directed at the Earth could ionize part of the atmosphere more steadily, making it easier for clouds to form, thereby absorbing large amounts of radiation from the sun and lowering the Earth's temperature.

3. Greenhouse gases: The warming of the earth's climate is related to the greenhouse effect caused by the large amount of greenhouse gases emitted by human beings. The greenhouse effect is the main cause of global warming, which scientists have proposed by examining the correlation between the increase in carbon dioxide emissions and the rise in temperature in the past 100 years.

4. Deforestation: Another cause of global warming is the wanton cutting of primary forests, which reduces the ability to absorb carbon dioxide from the atmosphere.

5. Carbon emissions: Since 1975, the average temperature of the earth's surface has risen by degrees Fahrenheit, and global warming caused by the greenhouse effect has become the focus of the world's attention. It has long been accepted in academia that carbon dioxide produced by burning coal, oil, natural gas, etc., is the culprit responsible for global warming.

However, after decades of observation and research, Dr. James Hansen from the Goddard Space Research Institute in the United States put forward a new view, arguing that greenhouse gases are not mainly carbon dioxide, but carbon particles and dust.

Climate warming mainly includes two aspects: human factors and natural factors.

Human causes. 1.Factors of population growth.

The rapid increase in population is one of the main factors contributing to global warming. At the same time, it also seriously threatens the balance between the natural ecological environment. With such a large number of people, the amount of carbon dioxide emitted by itself each year alone will be a staggering figure, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, and the resulting carbon dioxide "greenhouse effect" will directly affect the climate change on the earth's surface.

2.Atmospheric environmental pollution factors.

The increasing severity of environmental pollution has become a major global problem and one of the main factors leading to global warming. In the 21st century, research on global climate change has clearly pointed out that the temperature of the Earth's surface has begun to rise since the end of the last century.

Natural factors. 1.Volcanic activity.

2.The Earth's periodic orbit changes.

The periodic orbit of the Earth changes from an elliptical to a circular trajectory, which is closer to the Sun. According to a scientist's research, the temperature of the earth has alternated between high and low temperatures, and there is a certain regularity.