Why? The global climate is getting cold?

Actually, "global cooling" is not a new theory. The global cold weather from 1947 to 1976 made many meteorologists exclaim that "the Little Ice Age is coming". Back in the 194s, Milankovic proposed that the earth's orbit eccentricity, ecliptic angle and precession with cycles of 1, years, 4, years and 2, years, respectively, made the earth's climate change during the glacial and interglacial periods in the last period of the Cenozoic era. In 197s, a series of geological data, including deep-sea rock cores, coral reefs, pollen, tree rings and ice cores, proved the existence of this cycle. In January 1972, more than 2 European and American scholars who had just made great contributions to Milankovitch's theory gathered at Brown University to discuss "when and how the current interglacial period will end". After the meeting, Quaternary Research also published the album The End of the Current Interglacial Period. By the 199s, the global climate was warming rapidly, and the greenhouse effect and global warming became the focus of international research. However, scientists have never stopped studying global cooling, and from time to time, research results supporting "the coming ice age" have been published. In 1997, M·E· Ramyo published a paper in paleoceanography, saying that 1, years have passed since the Holocene as an interglacial period, and if there is no human interference, the next glacial period has come. In November 28, Thomas J. Coeroli, a professor of geophysics at the University of Edinburgh, published a paper in Nature, summarizing his research for more than 2 years. He believes that the earth is entering a new ice age, the northern hemisphere will be greatly affected, and parts of Europe, Canada and Asia will probably be covered under a permanent ice sheet, but the release of a large number of greenhouse gases seems to prevent the earth from entering this cycle. However, some Russian astronomers believe that the changes in solar brightness and solar activity have the greatest impact on the earth's climate. As the luminous intensity of the sun will gradually decline in the next few decades, the sun will enter a period of negative activity, and the earth's temperature will drop accordingly.