Worldwide, overgrazing is the main major. Nowadays, people have settled down in particular areas that have sufficient food supply and daily necessities. By educating them on , more land will be saved from becoming desert. Nomadic herders, grazing animals on arid and semi-arid lands, are particularly vulnerable to drought, since it depletes their most precious assets: their livestock herds. Done right almost any desert can be restored to good land again, with minimum effort, except for halting logging companies as they usually do not see trees as long term assets but as timber commodity. The first and the most important cause of desertification is human activities.
The rest has either become desert or is being threatened by desertification. Trends that either continued a downward spiral or a rapid improvement in diet are unlikely to be sustained for long. Barren soils lack this green filter, and therefore, more of these harmful substances enter our groundwater reservoirs. In addition, desertification has been a major driver behind the historical movement of large populations of humans — which obviously plays into the collapse of civilizations. Depleting the Land of Resources Is there oil, natural gas, or mineral in an area of land? Most especially in recent years but throughout much of recorded human history as well , much of the desertification around the world has been driven by human activity.
However, it is a misconception that droughts are responsible for desertification. Population growth and other demographic changes have led to losses of land to urbanization and the diminishing of per capita share of cultivated land in Nigeria. Really deserts turned into highly productive land, great pictures in the video. It needs to be done. Sedentarizing nomads and limiting their movements leads to desertification because it reduces their ability to adjust their economic activities in the face of stresses such as droughts. But such exploitation never lasts forever does it? Furthermore,deforestation reduces the protection of soil and because of rainforest destructions there is not enough water, the surface of soil becomes arid that leads to desertification. There is nothing new under the sun.
Logging, legal and illegal, often follows these new roads. In turn, the high evaporative. With the loss of their environment, most simply disappear — or, at the least, see a huge drop in their genetic diversity. The fraction of precipitation in spring tended to increase whilst the fraction in autumn and winter decreased. Which, itself, predictably leads to social problems. This along with the fast growing industrialization near urban centers add to the active desertification process.
Even if the land has been degraded, restoration can always be done and can help protect the ecosystem services. Earlier desertification was only a natural formation but day by day humans are becoming responsible for it because of land mismanagements. . So some of the creations or cultural beliefs of earlier civilizations are simply lost forever, never to be recreated — though there certainly are some things that are relatively constant, and seem to reoccur regularly. Policies leading to an use of resources and the lack of adequate infrastructures are major contributors to land. By 2025 there maybe 83 million Kenyans, with as many as 111 million before the population reaches its plateau. Round the decay Of that colossal wreck, boundless and bare The lone and level sands stretch far away.
The problem here is that the prospects of industrialization in Africa are dimmer than those in any other region of the world. The removal of vegetation cover worsens desertification and accelerates soil erosion which causes reduced soil fertility and eventually renders the land un-productive. The Roman Empire The Roman Empire was affected to no small degree by the effects of land degradation, soil erosion, and desertification. Most of the starving population lives in countries for example Kenya, Ethiopia, Angola, Zimbabwe and Somalia which are located in the East and in the South of the continent. A similar Great Green Wall stretching from Senegal to Djibouti is proposed to help stop the spread of the Sahara. I wonder if it is quite that easy to reverse desertification. Sure enough, people will soon discover it and will mine it or take it out.
Some countries, however, most of which depend for their incomes on sectors other than agriculture, should be able to preserve and even improve their nutritional standards. Agriculture can play either a positive or a negative role, depending on how it is managed. Unsurprisingly — given their location and power — these people eventually found themselves at war with the Roman Republic, during the Punic Wars. Salinization is the build up of salt in the soil over time. Environmentally, it contributes to climate change, water, air and soil pollution, deforestation and soil loss.
It is caused by a variety of factors, such as climate change and human activities. Desertification can also arise from climatic conditions and other human activities. Hence, desertification today has become the major environmental challenge. This further leads to water scarcity and human, as well as animal life is endangered due to shortage of drinking water. Or, to put it in another way, desertification results in persistent degradation of dryland and fragile due to man-made activities and variations in climate.
Is there anywhere in the world where it has been reversed on a large scale? Agree totally with the two above comments. This uncontrolled growth lead to rapidly increasing amounts of wastes solid and liquid causing pollution of land and water resources and worsens the desertification problem. The results showed that there was a rise of about 1. Through , farmers only speed up the process of desertification in exchange for poor quality crops with low economic value. Drylands cover almost 40 percent of the total land surface of the world and are inhabited by approximately 1 billion humans dispersed over more than 100 countries.
Some of the glaring aftermath effects of the environmental degradation are: less of global biological diversity, loss of biomass and bio-productivity, exhaustion of humus reserve, disrupting normal global bio-geochemical turnover, and reduction on the global carbon-dioxide sink. Not banning grazing animals high up otherwise perpetuates the no trees high up situation, as the grazing animals eat all the shoots. And had to be reintroduced from elsewhere long after it was forgotten in Britain. Interestingly, historical evidence has shown that there have been at least three major epicenters of extreme and extensive land deterioration in addition to less extreme occurrences of course — the Mediterranean; the Mesopotamian Valley; and the loessial plateau of China, where population levels have previously been quite dense. This is because the plant life plays a significant role in keeping the water clean and clear; without its presence, it becomes a lot more difficult for you to be able to do that. The causes of land degradation are also to be ascertained.