What does it mean that land subsidence will threaten nearly one fifth of the world s population by 2

This shows that we need to pay attention to the issue of human protection of the environment, and at the same time, we need to pay attention to the problem of population density and the basic survival of the population.

In modern society, few people think about the problem of land subsidence, let alone the problem between the grounds, which will affect the basic survival of many people. To some extent, if the global climate warms further, this will not only lead to further melting of glaciers in the Arctic and Antarctic, but also to sea level rise. In the process, some places at lower altitudes may be submerged by the sea, which will also lead to considerable challenges for the survival of many people.

What's going on with this study?

This is a statement by UNESCO that the phenomenon of sea level rise will be further exacerbated by the further melting of glaciers from the Antarctic and the Arctic due to global warming. If this situation is not reversed, nearly 1 5 percent of the world's population will be threatened by sea level rise around 2040, and many coastal cities in Southeast Asia could be directly inundated. <>

This shows that we need to pay close attention to the issue of protecting the environment.

To a certain extent, when we further develop industrial production technology, many of our production activities will actually affect the overall global environment, and will also lead to further global warming. After that, this problem will be fed back to us in various forms, and we will not only encounter all kinds of extreme weather, but also the problem of rising sea levels. Especially for the latter, the problem may even lead to the collapse of some cities.

Finally, I personally feel that environmental protection is a good obligation and responsibility for everyone, for us ordinary people, our power alone may be limited, but if everyone can pay full attention to the issue of protecting the environment, our lives will become better and better.

It shows that a large number of people's lives will be affected by then. The subsidence area is concentrated in Asia, with Indonesia being the most severe, with 25 cm of subsidence per year.

This shows that the coastal economy is also about to develop into the interior as soon as possible. After all, if the ground sinks too fast, the threat to them is also relatively large.

In February 2012, China's first land subsidence prevention and control plan was approved. In January 2021, a study organized by UNESCO's Land Subsidence Working Group warned that by 2040, land subsidence would threaten nearly 1 in 5 people worldwide.

The representative areas with serious land subsidence in China include Shanghai, Tianjin, Ningbo and Jiaxing in Zhejiang, Suzhou, Wuxi and Changzhou in Jiangsu, Cangzhou, Tangshan, Hengshui, Baoding, Renqiu and Nangong in Hebei, Heze, Jining and Dezhou in Shandong, Fuyang in Anhui, Linfen, Taiyuan and Datong in Shanxi, Anyang, Kaifeng, Luoyang, Xuchang and Zhengzhou in Henan, Taipei, Changhua and Pingtung in Taiwan, Xi'an, Beijing and Songliao Plain in Shaanxi. Among these areas are the Yangtze River Delta represented by Shanghai, the Bohai Rim represented by Tianjin, and Xi'an.

There are also two types of surface fractures, one is the fracture caused by the uneven settlement of bedrock faces and Quaternary sediments of different thicknesses, which can be found in many places, such as Wuxi and Changzhou. The other is caused by geological factors and over-exploitation of groundwater, such as cities such as Xi'an and Taiyuan.

Regional tectonic stress plays an important role in fracture formation, which controls the fracture growth pattern, but the main reason is land subsidence caused by overexploitation.