Answer:
the crust is the answer of that question
No, the desertification is not a problem only where there is an existing desert.
Explanation:
The desertification is a process through which an area gradually transforms into a desert. This process can happen because of multiple factors, roughly being divided into two groups; anthropogene and natural. The desertification mostly appears in areas that border the deserts, but it also appears on places that are far away and have no contact with any deserts.
Naturally, the desertification occurs because of changes in the climate, so if the climate becomes drier and warmer, the deserts will start expending. The problem is that the humans actually started to be the main factor leading to desertification with their activities. Very often, the humans are not responsible towards the environment, and they destroy the vegetation, the soils, which in turn causes large scale erosion and local climate changes, and an area becomes a desert very quickly.
There has been efforts in the past few decades to stop the desertification and even reverse it. Most noticeably, it has been China that has had the biggest success in this, managing to turn millions of hectares into green areas. Also, the countries of the Sahel region have come together to make a green wall between the desert and the savanna, and the results have been very positive.
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maps Earth on a flat surface
Explanation:
A map projection simply maps the earth to a flat surface. There are different kinds of map projections.
- The earth is a spherical three dimensional solid body.
- It is difficult to simply work with three dimensional bodies.
- Map projection uses mathematical techniques to flatten the earth.
- This can lead to different kinds of distortion of the earth on the map.
- Angles and distances are usually the worst hit.
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Archaeology is the study of human activity in the past, primarily through the recovery and analysis of the material culture and environmental data that has been left behind by past human populations, which includes artifactss, architecture, biofacts and cultural landscapes . Because archaeology employs a wide range of different procedures, it can be considered to be both a social science and a humanity and in the U.S, it is thought of as a branch of anthropology although in Europe it is viewed as a separate discipline.
A historian<span> is a person who studies and writes about the past and is regarded as an authority on it.</span><span> Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time. If the individual is concerned with events preceding written history, the individual is a historian of prehistory</span><span>. Although "historian" can be used to describe amateur and professional historians alike, it is reserved more recently for those who have acquired graduate degrees</span><span> in the discipline. Some historians, though, are recognized by publications or training and experience.</span><span> "Historian" became a professional occupation in the late nineteenth century as research universities were emerging in Germany and elsewhere.
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Geographers study the earth and its land, features, and inhabitants. They also examine phenomena such as political or cultural structures as they relate to geography. They study the physical and human geographic characteristics of a region, ranging in scale from local to global.
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