What are the extreme impacts of global warming on the climate in the northern hemisphere? List some extreme events.

Global warming is a phenomenon related to nature. Because people burn fossil fuels, such as oil and coal. Or cutting down and burning down forests will produce a lot of carbon dioxide, that is, greenhouse gases, which have a strong permeability to visible light emitted by the sun, a strong absorption to long-wave radiation emitted by the earth, and a strong absorption of infrared radiation from the ground, leading to an increase in the temperature of the earth, that is, the greenhouse effect. However, when the greenhouse effect is accumulating, the energy absorbed and discharged by the geo-atmospheric system is unbalanced, and the energy is accumulating in the geo-atmospheric system, which leads to the rise of temperature and global warming. Global warming will redistribute global precipitation, melt glaciers and frozen soil and raise sea level, which will not only endanger the balance of natural ecosystems, but also threaten human survival.

On the other hand, due to the greenhouse gas emissions from the land, the temperature in the mainland rises and the temperature difference with the ocean becomes smaller. Recently, the airflow has slowed down, and the smog can't be blown away in a short time, which has led to an increase in smog weather in many cities, affecting human health. Measures such as car restrictions and production suspension have only short-term and local effects, and cannot fundamentally change climate warming and smog pollution.