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Imagine a world of deserts…
General information about desertification
Desertification is the deterioration of land by erosion. It most often occurs in arid areas, where human activity or climate change (or both) have greatly affected an area. Fresh water supplies and land can be easily destroyed, and if land is degraded, drylands will not be able to renew water and land resources and will turn into desert. Due to the loss of plants and trees by human activity, erosion also destroys much of the dry land surface, disabling any vegetation, leading to famine and loss of biodiversity in the area.
What causes desertification?
The main causes of desertification are overgrazing of cattle, over-cultivation of crops, deforestation, increase in the number of fires per year, excessive use of underground water, increase in the amount of salt in the soil and climate change. Overgrazing and fires cause the destruction of dryland plants, destroying dryland biodiversity. Over-cultivation and increased salinity can lead to the destruction of topsoil, which is important for crop growth. In vegetated areas, the soil is often cooler than the rest of the dry land and prevents land winds from eroding the soil surface. Climate change and droughts can cause a decrease in the amount of fresh water, which will prevent plant growth.
All these processes involve the overpopulation of dry lands. Where there are more people, there will be destruction of dry lands.
What is being done to stop desertification?
To stop desertification, we need to look at what causes desertification. There is no other way to remove the effect of overgrazing or overcultivation of the land, except by not using the land. This is not a smart way to stop desertification, as people need the food and other resources that come from dry lands. However, to stop erosion, there have been some tree belts, rows of trees that prevent the wind from blowing away topsoil in dry lands. In northeast China it will be the “Green Wall of China” that will rise. It is a wall of trees that is almost as tall as the Great Wall of China. For the loss of fresh water, people should use the idea of sustainable resources so that water can be saved. Also, in some areas, legumes have been used to extract nitrogen from the atmosphere into the soil to restore soil fertility. Also, to combat deforestation, people have used heat to their advantage with solar cooking instead of using wood for fuel.
How has desertification affected us?
Desertification is like a monster that eats the land it passes through. It is worse than a hurricane, an earthquake or a fire. Once it’s somewhere, it’s really hard to get that place back because it makes it hard for plants to grow there by destroying the soil, and things can’t live there because there’s no water. Desertification is like the disease of the soils. In China, desertification is spreading very fast. China’s ever-increasing population rate is causing much of its land to die. Deserts and storms will cause 50 billion dollars to China’s economy. (Bill Gates only has $60 billion – just a random thought) Dust storms caused by desertification will destroy much of the country’s agriculture. Isn’t that bad enough? Also, in the USA in the 1930s, there was the Dust Bowl in the Great Plains, causing many people to abandon their homes. People caused the Dust Bowl by not farming properly and there was also a drought at the time. In the Sahelian kingdoms in Africa, desertification and drought caused the deaths of over 100,000 people. Every day, people die because of poverty and hunger, but have you thought about what causes all this? It is the poor quality of the soil and the lack of water that causes these deaths. If desertification were stopped, there would be no poverty.
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