What will happen after global warming?

Global warming is a big problem. Western sociologists have combed human history and confirmed that there are five main factors that may lead to the decline of the existing society: environmental damage, climate change, choices made on social and environmental issues (government decisions), loss of trading partners and beggar-thy-neighbor. All these factors, alone or in combination, may lead to social unrest or collapse. Global warming involves three of them, and it is urgent to solve it.

In order to stop the global warming trend, the United Nations has specially formulated the United Nations Framework Convention on Climate Change, which has been formally ratified by 197 countries. Global warming is a phenomenon related to nature. Due to the continuous accumulation of greenhouse effect, the energy absorbed and discharged by the geogas system is unbalanced. The continuous accumulation of energy in the earth-atmosphere system leads to the increase of temperature and the warming of climate.

Due to the rapid development of modern industrialization, people burn fossil fuels (such as oil and coal) or cut down forests and burn them, producing a lot of greenhouse gases such as carbon dioxide. These gases are highly permeable to the visible light emitted by the sun, but extremely absorbent to the long-wave radiation (such as infrared rays in radiation) emitted by the earth's surface, which causes the atmospheric temperature to rise.

In particular, the extensive use of fossil fuels, on the one hand, causes greenhouse gas emissions, on the other hand, it also forms acid rain, which destroys and reduces the surface vegetation and intensifies the greenhouse effect.

Laurence C.Smith is a professor at the University of California, Berkeley. His work occupies a prominent position in the Fourth Assessment Report of the United Nations Intergovernmental Panel on Climate Change (IPCC). He pointed out that the severe environmental situation caused by global warming is no longer? Is it true?/You don't say. /You don't say. ? This kind of problem, but what about global warming? What will happen? ? 、? What shall we do? Equal certainty problem. This is related to the global pattern of human existence in the 2 1 century, and it is by no means alarmist.

What will happen to global warming?

First of all, climate warming has just begun. Scientists are 90% sure that if greenhouse gas emissions continue to develop at the current or higher speed, the climate change in 2 1 century will be far more serious than at any time in history. According to IPCC, considering population growth, greenhouse gas emissions may continue to cause global climate warming in the next century, and the global average temperature will rise by 1.8 ~ 4.0 degrees Celsius by the end of 2 1. How much temperature rises depends on how much carbon dioxide we release into the atmosphere.

Secondly, due to the long life of greenhouse gases in the atmosphere, the ocean is slow to respond to them. No matter how the policies formulated by governments change, it is an indisputable fact that the global temperature will rise at least until 2030. Even if the global greenhouse gas emissions are limited to the level of 2000, climate warming will continue until the middle of this century, and the trend of melting ice and snow at the poles and rising sea level caused by it will be irreversible.

Third, the rising temperature will aggravate the evaporation of surface water, make the soil dry, frequent droughts and expand land desertification. The research team believes that climate warming will greatly increase the number of extreme drought days in western North America, southern Europe, southern Africa and central and western Asia, reduce food production and break the natural food chain.

In other areas, due to the increase of air humidity, the global precipitation is redistributed, the rainy season is prolonged, and the frequency of extreme precipitation events (floods) is increased. Melting glaciers and frozen soil, decreasing fresh water reserves and rising sea level will destroy the balance of natural ecosystems. According to the report in the Proceedings of the National Academy of Sciences, an independent research center has concluded that with the sea level rising, by 2 100, thousands of cities in low-altitude coastal areas around the world will be flooded, losing their land and thousands of residents will be forced to leave their homes.

In addition, there are many impacts and hazards today: Arctic sea ice melts, polar bears drown, and Inuit hunters lose their jobs; In North Africa, the Middle East and South Asia, there may be conflicts or wars for water resources. In coastal areas, the loss of wetlands, land salinization, typhoons and other disastrous weather have increased; Serious water pollution, rapid spread of diseases, etc. These are all symbols of global warming. There are also natural destructive factors of the earth, such as earthquakes, volcanic eruptions, tsunamis and other adverse climate effects. The facts are before us. Although we can't completely stop global warming, we can at least take measures to reduce its impact and delay its arrival.