Green food refers to the food that conforms to the relevant laws and regulations of national food safety and quality management, does not use chemical substances such as chemically synthesized pesticides and fertilizers, does not add chemical components such as artificial colors, spices and preservatives, and adopts healthy, safe and environmentally friendly production methods such as biotechnology and organic agriculture. At present, there are two main standards for green food certification in China, namely "green food mark products" and "organic food products".

The advantages of green food are obvious. First of all, green food is healthier and safer, and contains no harmful artificial chemicals, which can reduce the contents of carcinogens, heavy metals and other harmful substances in food. Secondly, green food meets the requirements of sustainable development, does not pollute the environment, and helps to protect the balance between the environment and the ecosystem. Finally, green food can promote agricultural structural adjustment and technological innovation, increase farmers' income and sustainable agricultural development. Therefore, we should vigorously promote the production and consumption of green food.

Green food is the trend of future development. However, its development still faces some challenges. On the one hand, the production cost and price of green food are relatively high, and consumers' acceptance and purchasing power need to be improved. On the other hand, there are still some problems in the production and sales of green food, such as nonstandard certification and lack of industrial chain management. To realize the sustainable development of green food industry, it is necessary to strengthen the supervision of relevant supporting policies and standards, guide consumers to choose green food, and promote the cognitive and behavioral changes of the whole society on health, environmental protection and sustainable development.