The land is not very suitable for agriculture, meaning the people who live here would not be able to farm or grow any crops. In addition, the weather is not suitable for farming or agriculture as well. This would be another reason the residents would not be able to farm.
In this cartoon, since this area is in a war, all, if not all of the supplies from the area will be used up and they residents will not have any for themselves. This will lead the area to have a decrease from the people dying in the war and because people are not getting enough nutrients and supplies to stay healthy.
In this comic, the area is overpopulated, so there are many buildings that need to be build such as houses. This will cause the land to become more crowded. This can bring problems and crime rates up. This is because there are many people, but not all work. This will lead some of them to resort to things such as stealing or other illegal activities. It can also cause the death rates to go up since there are a limited amount of resources with a high amount of people.