Contributing Factors of the Next Glacial Period

As Arnold Schwarzenegger once said, "Before it is too late, we must make every effort to delay global warming, the science is clear: discussion on global warming Has it finished?) Are our societies really working to prevent global warming from being a bigger disaster than it is now, or are they causing things like a series of unfortunate events? Andrew Conggin, author of "Global Warming Erosion Glacier Ice," believes that the main cause of global warming is human activity.

The earth is now in the cold season characterized by the formation of glaciers (glacial maxima), followed by the warm period of glacier melts (interglacial period). These glacial - interglacial cycles occur at a frequency of approximately 100,000 years. We are currently in the interglacial period, and these lasted about 23 thousand years. The maximum of the last glacier was about 18000 years ago. Circumferential rotation melts the glacier; more solar radiation; ellipse = less radiation. The amount of solar radiation reaching the earth will change, leading to climate change. The shape of the Earth's orbit changes at a cycle of 100,000 years. The angle at which the shaft tilts varies in the period of about 41,000 years. The direction of the Earth changes over the period of about 22,000 years for other celestial bodies.

The end of the Ice Age: The last ice age has ended from 10,000 years ago 15,000 years ago. This seems to be consistent with the emergence of agriculture. At the end of the glacial period, moisture in the air increases, frozen soil is reduced, and the living environment of plants and animals as a whole improves. These conditions are also suitable for agriculture. There are still unsolved problems in this theory. 1) Why was there no evidence of agriculture in the glacial period during the last 100,000 years ago? Still can not find it?

Environment: Environmental factors often influence human movement and settlement patterns. The general theory is that agriculture appeared after the ice ages, after the earth warmed up and the land became more susceptible to breeding. Agriculture has developed independently in many areas, people in each area have locally available flora and fauna. People cleaned a large area of ​​land and established an irrigation system, which had a tremendous impact on the environment. Economic social structure: Agricultural surplus enables more complex economic systems. After the Neolithic Revolution, a new labor system was developed. With the emergence of a stable food supply, people increase time to concentrate on professional work and lead to specialization of the labor force. The development of special labor systems has brought the emergence of various categories of farmers, craftsmen, combatants, and elites.