Natural causes of global warming

The natural causes of global warming are as follows:

1. solar radiation: solar radiation is the main source of the earth's surface temperature. In recent years, the intensity of solar radiation has increased, leading to an increase in the surface temperature of the earth. This phenomenon may be caused by the change of solar activity cycle or other natural factors.

2. Atmospheric circulation: Atmospheric circulation refers to the global atmospheric movement. Changes in atmospheric circulation will also affect the global climate. For example, the weakening of polar vortex makes the cold air in polar regions unable to spread to low latitudes, which leads to the rise of global temperature. In addition, the atmospheric circulation pattern in some areas may also change, affecting the local climate.

3. Ocean current: Ocean current refers to the global ocean flow. Ocean currents have an important influence on the global climate. For example, the North Atlantic warm current has an important influence on the climate in Europe. In recent years, the ocean current patterns in some areas have changed, which has affected the local climate.

4. Natural disasters: natural disasters such as volcanic eruptions and earthquakes will also have an impact on the global climate. For example, gases and particles produced by volcanic eruptions will block sunlight, causing the global temperature to drop. Geological activities such as earthquakes will also change the surface morphology and atmospheric structure and affect climate change.

5. Natural circulation: The earth's climate is also affected by natural circulation. For example, changes in the earth's orbit, volcanic activity and changes in atmospheric composition will all have an impact on the global climate. These natural cycle changes may be the result of the earth's own evolution or other unknown factors.

Harm of global warming:

1, sea level rise: global warming causes glaciers to melt, which in turn leads to sea level rise. This poses a serious threat to coastal cities and island countries, and may lead to problems such as floods and seawater intrusion.

2. Extreme weather events: Global warming leads to changes in climate patterns, which in turn leads to more extreme weather events. For example, the frequency and intensity of extreme weather events such as severe storms, floods and droughts have increased, which has brought great challenges to human society and the natural environment.

3. Biodiversity reduction: Global warming poses a serious threat to biodiversity. Many species' habitats have been destroyed, resulting in population reduction or even extinction. In addition, global warming also leads to the spread of disease vectors, increasing the probability of human and animal diseases.

4. Decline in agricultural productivity: Global warming may lead to an increase in extreme weather events such as drought and flood, posing a serious threat to agricultural productivity. These extreme weather events may lead to problems such as crop yield reduction and quality degradation, and then affect global food security.

5. Water shortage: Global warming leads to accelerated water evaporation, which in turn leads to water shortage. This is a serious problem for many developing countries, because the shortage of water resources may lead to the shortage of drinking water and the decline of agricultural productivity.