Global warming leads to frequent extreme meteorological events. What are the causes of global warming?

The main causes of global warming are the destruction of the atmosphere, serious pollution and the possible impact of global warming. Global warming will bring complex potential impacts on the earth and human beings, both positive and negative. For example, with the increase of temperature, sub-polar regions may be more suitable for human habitation; Under appropriate conditions, higher carbon dioxide concentration can promote photosynthesis, make plants have higher carbon fixation rate, and lead to the increase of plant growth, that is, the yield-increasing effect of carbon dioxide, which is the positive impact of global warming. However, compared with the positive impact, the negative impact of global warming on human activities will be greater and far-reaching.

Introduction to basic hazards: 1. The heat energy brought by the rising temperature will provide great kinetic energy to the air and ocean, thus forming large or even super-large typhoons, hurricanes, tsunamis and other disasters. More and more disasters are suffered and faced every year, and more and more lives and money are lost, which is more and more unacceptable. Disasters such as typhoons and tsunamis not only directly destroy buildings and threaten human life safety, but also bring secondary disasters, especially the rainstorm brought by typhoons and hurricanes, which will lead to mudslides and landslides, seriously threatening traffic safety and residents' life safety.

? 2. Rising temperature will not only absorb water directly from the ocean, but also from the land, which will lead to a large area of drought in inland areas, thus reducing food production and feed production. Food and meat will be in short supply, which will directly threaten the stability of the country. The panic and struggle caused by food will not happen again in backward villages.

? The melting iceberg with rising temperature is the most important source of fresh water for our survival. Most of our underground fresh water reserves come from iceberg meltwater. When the temperature balance is normal, the ice and snow circulation system of icebergs melts down the mountain and flows into the ground in summer, accumulating fresh water for the plain area and playing a filtering role. In winter, water returns to the mountains in the form of steam. After a lot of snowfall, snow and ice accumulate again, which is also a filtering process. The whole circulation process ensures the stability and balance of our fresh water. Nowadays, global warming makes the ice and snow accumulation speed of icebergs not as fast as melting speed, and even some icebergs no longer accumulate, thus cutting off local fresh water drinking. This will lead to conflicts and wars caused by water shortage.

? 4. The increase of carbon dioxide content in the atmosphere will lead to the increase of carbon dioxide content in the ocean, which will carbonate the ocean and kill a large number of microorganisms. Rising ocean temperature will also destroy a large number of coral-centered biological chains. The disappearance of bottom food makes the marine food chain break rapidly from the bottom and spread to the outside of the ocean. Because there is no food, there will be a large number of marine life, and other creatures that feed on marine life will also die. The death of a large number of creatures in the ocean will pollute the ocean and accelerate the death of other creatures; At the same time, it releases a lot of greenhouse gases, accelerates global warming and forms a vicious circle.