A food desert refers to a city or region where the level of food is relatively low and cannot meet people’s needs and expectations for food. And this may be due to a number of factors.

First, climate conditions may be a factor. For example, in some inland cities that are far away from the sea or have a high degree of desertification, it is difficult to grow fresh fruits and vegetables, rich seafood and other ingredients due to limitations of the natural environment. As a result, local cuisine will be restricted and appear monotonous and slightly boring, causing people to lose their enthusiasm for tasting delicious food.

Secondly, humanistic factors may also affect the level of food in a city. If a city's history, culture and tradition do not emphasize the importance of food, then in the local catering industry, the standard of food quality will not be high enough and it will be difficult to meet customer needs. If operators ignore the freshness and quality of ingredients, even a dish with a great reputation will lose its original charm.

Finally, the level of economic development is also an important factor affecting the level of food. Some economically backward cities may not be able to afford higher food costs, which limits the development of the local catering industry and prevents the introduction of a rich variety of ingredients and cooking techniques. In addition, because consumers' consumption levels are not high enough, restaurant operators tend to cut costs and reduce investment in ingredient prices and chef equipment, which will directly lead to a decline in the quality of food.

To sum up, whether a city becomes a "food desert" is not simply determined by one of the factors, but by multiple factors such as climate, humanities, and economy. The result of the action. To get rid of the title of "food desert" in the city, efforts and active promotion from all aspects are needed. For example, the government can introduce preferential policies to attract more local catering operators to join and introduce more specialty catering brands; at the same time, it can support and encourage local chefs to learn new cooking techniques and upgrade traditional dishes into gourmet dishes. These methods can effectively improve a city's food level and attract more tourists to experience the local food culture.