This Should Help a Little:
A largely semi-arid belt of barren, sandy and rock-strewn land, the Sahel marks the physical and cultural transition between the continent's more fertile tropical regions to the south and its desert in the north. ... The Sahel also suffers from ethno-religious tensions, political instability, poverty and natural disasters.
Answer:
corn ($9.210 billion) for usa
Canada's Agri-food exports exceeded $51 billion
Answer:
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In the United States, about 483 billion cubic meters of freshwater, or about 16% percent of the renewable supply, are withdrawn from the ground or from rivers and lakes per year.
Explanation:
River water, lacustrine water are some of the source of fresh water. Fresh water is the only genuine source of drinking water and other needful services. In United States about 483 billion cubic meters of fresh water withdrawn from under ground or rivers or from lakes.
Out of 100% only 16% withdrawn from different sources as fresh water. As a fresh water percentage it is a very high because availability of fresh water in earth's surface is limited. Ground water extraction or river water withdrawal should be in limit otherwise it will contaminate the water and will destroy civilization.
