ECOLOGY
ENVIRONMENTAL ISSUES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
The cutting down of a large area of trees
|
|
|
The build up of salt in soil due to chemical fertilizers
|
|
|
When rivers become too polluted and dry up like a desert
|
|
|
When the land gradually turns into a desert
|
Detailed explanation-1: -According to United Nations Convention to Combat Desertification (UNCCD) desertification is defined as “land degradation in arid, semiarid and dry subhumid regions due to consequences of various factors, including climatic variations and anthropogenic activities”.
Detailed explanation-2: -Desertification is the degradation process by which a fertile land changes itself into a desert by losing its flora and fauna, this can be caused by drought, deforestation, climate change, human activities or improper agriculture.
Detailed explanation-3: -The United Nations’ official definition says desertification is land degradation in typically dry areas resulting from various factors, including climatic variations and human activities.
Detailed explanation-4: -It is caused by frequent changes in temperature and many human activities. Excessive loss of trees due to deforestation resulted in dried climate and desertification (or the transformation of the fertile land into desert).
Detailed explanation-5: -desertification, also called desertization, the process by which natural or human causes reduce the biological productivity of drylands (arid and semiarid lands).