Compromises of a Growing World With the world growing at a pace hard to match, the increasing need for space is turning out to be an area of concern.
Or, to put it another way — desertification is the process by which previously biologically productive land is transformed into wasteland. Or nudge it off a cliff, for that matter.
Pushing it off a cliff. Most especially in recent years but throughout much of recorded human history as wellmuch of the desertification around the world has been driven by human activity.
Feel free to take a look back at the history of the last or so years for a glimpse of that reality — the smoking, shredded ruins of civilizations, cultures, value systems, and ethnic identities, are the fertile and chaotic environments where different ways of organizing and experiencing the world begin to emerge and are tested in the very harsh environments of the times.
And desertification has been, is, and will remain, as a significant driver in the collapse of civilizations. Desertification Top 10 List 1. Harappan Civilization Desertification has played a major part in much of recent human history last 10, or so years. 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.
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.
These regions were all, until human activity, biologically rich, forested to some degree or other, and agriculturally very productive — with rich, dense topsoil. Humans played a very, very significant role in turning these regions into the rather dry and arid regions that they are now.
It extended from around what is today northeast Afghanistan to Pakistan and northwest India an area of 1.
At its peak it was home to over 5 million people spread out over 1, known cities and settlementsbased on best estimates — putting it on scale with a large metropolitan center of our time. 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.
All that remains after this long period of decline and disintegration is often maybe only a spare piece of art buried in the dry ground of what was once a riverbed; a bit of a story etched on a piece of stone, a strange machine in a sunken ship see: Antikythera mechanism ; or the decayed ruins of a monument lying in the middle of, what is now, a huge desert; etc.
A good example of this process is the loss of the pottery wheel in post-Roman Britain. But it was forgotten.
And had to be reintroduced from elsewhere long after it was forgotten in Britain. Vortigern and the Saxonsno doubt. In other words — the four horsemen. Some of these drivers are simply the result of natural environmental variation and shifts that are the result of larger natural patterns, but many are also simply the direct result of human actions.
Though of course there was also a fair bit of admixture as well. So, in other words, bad outcomes no matter what course of action is taken. Mass migration has throughout history been a destroyer of civilizations. Very interestingly, recent research has shown that the date at which they are first mentioned in Egyptian writings nearly coincides with a very large eruption of the Santorini volcano estimated between BC.
The eruption and its aftermath fires, tsunami, weather changes and famines would have had wide-ranging effects across the Mediterranean, the Levant and particularly Greece, and could have provided the impetus for invasions of other regions of the Mediterranean.
Generally such periods see the disintegration of cultural values, complex economic systems, technological systems, complicated urban infrastructure, ethnic identities, and often of writing systems and languages as well. The trade networks that had previously spanned throughout all of the Mediterranean — and as far afield as the Caucasus, Germany, Ireland, and England — fell apart; a great many of the technologies of the time disappeared or became rare for the isolated-rich only ; cities depopulated; and the old culture disintegrated — into the isolated village cultures of the Greek Dark Ages.
The population of Greece was reduced, and the world of organized state armies, kings, officials, and redistributive systems disappeared. This is caused, and acts in concert with, a number of other factors — including drought, overgrazing, deforestation, common agricultural practices, and changes in the climate.
These, now barren, unprotected dry-surfaces result in the washing and blowing away of the top — and most fertile — layers of soil.
This leaves only the less-biologically-active lower-soil-layers, which are often then subsequently baked dry and hard in the sun. Unsurprisingly — given their location and power — these people eventually found themselves at war with the Roman Republic, during the Punic Wars.
With this region now under Roman control or destroyed, more accurately it became known as Africa Proconsularis — a province ruled by a Roman Proconsul. Much of what remains of the infrastructure built by the Romans during this time lies in what is now desert, but was at the time highly fertile land that supported large populations.
In fact — though it may be funny to consider it now — Northern Africa was, at the time, the breadbasket of the Roman Empire.Mass movement, or mass wasting, has significant effects on humans, including loss of property, severe injury and death.
This has become a larger problem as the human population grows and people have spread over more previously uninhabited land. Or you have a question to ask.
Captain Robert Fore and previously unseen photographs of the a discussion on the destruction of earth and the effects of peoples actions Primrose rescue.
Dear Real Zionist News Family. The following discussion does not provide The effects of human activities on the quan-tity and quality of water resources are felt over a wide range of space and time scales.
In the EFFECTS OF HUMAN ACTIVITIES ON THE INTERACTION OF GROUND WATER AND SURFACE WATER. Human Causes of Global Change All the human causes of global environmental change happen through a subset of proximate causes, which directly alter aspects .
On completion of your paragraph, contribute to a class discussion about the effects of deforestation. Create a table with the causes of deforestation from your earlier work in the first column, and match the effects to each cause. For example, global warming is the direct result of a change in the earth's radiative balance; humans can mitigate global warming by any actions that slow the rate of change or limit the ultimate amount of change in the radiative balance.